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Finding the Fourth Proportional to 71,194.49, 98,248.57 and 38,931.20

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Solution

The fourth proportional to 71,194.49, 98,248.57 and 38,931.20 is: 53,725.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,194.49 : 98,248.57 = 38,931.20 : x
  2. Step 2: Convert to fraction form
    71,194.49/98,248.57 = 38,931.20/x
  3. Step 3: Cross multiply
    71,194.49x = 98,248.57 × 38,931.20
  4. Step 4: Simplify right side
    71,194.49x = 3,824,934,876.68
  5. Step 5: Solve for x
    x = 3,824,934,876.68/71,194.49
  6. Step 6: Final answer
    x = 53,725.15

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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.