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Finding the Fourth Proportional to 71,800.30, 107,683.98 and 21,186.28

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Solution

The fourth proportional to 71,800.30, 107,683.98 and 21,186.28 is: 31,774.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,800.30 : 107,683.98 = 21,186.28 : x
  2. Step 2: Convert to fraction form
    71,800.30/107,683.98 = 21,186.28/x
  3. Step 3: Cross multiply
    71,800.30x = 107,683.98 × 21,186.28
  4. Step 4: Simplify right side
    71,800.30x = 2,281,422,951.79
  5. Step 5: Solve for x
    x = 2,281,422,951.79/71,800.30
  6. Step 6: Final answer
    x = 31,774.56

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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.