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Finding the Fourth Proportional to 81,562.17, 112,490.87 and 67,390.41

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Solution

The fourth proportional to 81,562.17, 112,490.87 and 67,390.41 is: 92,945.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,562.17 : 112,490.87 = 67,390.41 : x
  2. Step 2: Convert to fraction form
    81,562.17/112,490.87 = 67,390.41/x
  3. Step 3: Cross multiply
    81,562.17x = 112,490.87 × 67,390.41
  4. Step 4: Simplify right side
    81,562.17x = 7,580,805,513.60
  5. Step 5: Solve for x
    x = 7,580,805,513.60/81,562.17
  6. Step 6: Final answer
    x = 92,945.12

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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.