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Finding the Fourth Proportional to 71,602.38, 98,869.41 and 64,035.36

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Solution

The fourth proportional to 71,602.38, 98,869.41 and 64,035.36 is: 88,420.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,602.38 : 98,869.41 = 64,035.36 : x
  2. Step 2: Convert to fraction form
    71,602.38/98,869.41 = 64,035.36/x
  3. Step 3: Cross multiply
    71,602.38x = 98,869.41 × 64,035.36
  4. Step 4: Simplify right side
    71,602.38x = 6,331,138,262.34
  5. Step 5: Solve for x
    x = 6,331,138,262.34/71,602.38
  6. Step 6: Final answer
    x = 88,420.78

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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.