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Finding the Fourth Proportional to 71,641.32, 98,860.68 and 39,809.14

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Solution

The fourth proportional to 71,641.32, 98,860.68 and 39,809.14 is: 54,934.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,641.32 : 98,860.68 = 39,809.14 : x
  2. Step 2: Convert to fraction form
    71,641.32/98,860.68 = 39,809.14/x
  3. Step 3: Cross multiply
    71,641.32x = 98,860.68 × 39,809.14
  4. Step 4: Simplify right side
    71,641.32x = 3,935,558,650.62
  5. Step 5: Solve for x
    x = 3,935,558,650.62/71,641.32
  6. Step 6: Final answer
    x = 54,934.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.