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Finding the Fourth Proportional to 71,387.95, 98,515.28 and 39,558.91

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Solution

The fourth proportional to 71,387.95, 98,515.28 and 39,558.91 is: 54,591.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,387.95 : 98,515.28 = 39,558.91 : x
  2. Step 2: Convert to fraction form
    71,387.95/98,515.28 = 39,558.91/x
  3. Step 3: Cross multiply
    71,387.95x = 98,515.28 × 39,558.91
  4. Step 4: Simplify right side
    71,387.95x = 3,897,156,897.35
  5. Step 5: Solve for x
    x = 3,897,156,897.35/71,387.95
  6. Step 6: Final answer
    x = 54,591.24

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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.