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Finding the Fourth Proportional to 71,381.10, 107,071.65 and 45,000.30

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Solution

The fourth proportional to 71,381.10, 107,071.65 and 45,000.30 is: 67,500.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,381.10 : 107,071.65 = 45,000.30 : x
  2. Step 2: Convert to fraction form
    71,381.10/107,071.65 = 45,000.30/x
  3. Step 3: Cross multiply
    71,381.10x = 107,071.65 × 45,000.30
  4. Step 4: Simplify right side
    71,381.10x = 4,818,256,371.50
  5. Step 5: Solve for x
    x = 4,818,256,371.50/71,381.10
  6. Step 6: Final answer
    x = 67,500.45

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.