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Finding the Fourth Proportional to 71,764.92, 99,035.60 and 39,935.88

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Solution

The fourth proportional to 71,764.92, 99,035.60 and 39,935.88 is: 55,111.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,764.92 : 99,035.60 = 39,935.88 : x
  2. Step 2: Convert to fraction form
    71,764.92/99,035.60 = 39,935.88/x
  3. Step 3: Cross multiply
    71,764.92x = 99,035.60 × 39,935.88
  4. Step 4: Simplify right side
    71,764.92x = 3,955,073,837.33
  5. Step 5: Solve for x
    x = 3,955,073,837.33/71,764.92
  6. Step 6: Final answer
    x = 55,111.52

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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.