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Finding the Fourth Proportional to 67,243.40, 100,865.10 and 40,999.40

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Solution

The fourth proportional to 67,243.40, 100,865.10 and 40,999.40 is: 61,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,243.40 : 100,865.10 = 40,999.40 : x
  2. Step 2: Convert to fraction form
    67,243.40/100,865.10 = 40,999.40/x
  3. Step 3: Cross multiply
    67,243.40x = 100,865.10 × 40,999.40
  4. Step 4: Simplify right side
    67,243.40x = 4,135,408,580.94
  5. Step 5: Solve for x
    x = 4,135,408,580.94/67,243.40
  6. Step 6: Final answer
    x = 61,499.10

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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.