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Finding the Fourth Proportional to 71,620.56, 98,838.14 and 39,354.92

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Solution

The fourth proportional to 71,620.56, 98,838.14 and 39,354.92 is: 54,310.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,620.56 : 98,838.14 = 39,354.92 : x
  2. Step 2: Convert to fraction form
    71,620.56/98,838.14 = 39,354.92/x
  3. Step 3: Cross multiply
    71,620.56x = 98,838.14 × 39,354.92
  4. Step 4: Simplify right side
    71,620.56x = 3,889,766,648.78
  5. Step 5: Solve for x
    x = 3,889,766,648.78/71,620.56
  6. Step 6: Final answer
    x = 54,310.75

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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.