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Finding the Fourth Proportional to 82,331.70, 123,497.55 and 81,456.90

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Solution

The fourth proportional to 82,331.70, 123,497.55 and 81,456.90 is: 122,185.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,331.70 : 123,497.55 = 81,456.90 : x
  2. Step 2: Convert to fraction form
    82,331.70/123,497.55 = 81,456.90/x
  3. Step 3: Cross multiply
    82,331.70x = 123,497.55 × 81,456.90
  4. Step 4: Simplify right side
    82,331.70x = 10,059,727,580.60
  5. Step 5: Solve for x
    x = 10,059,727,580.60/82,331.70
  6. Step 6: Final answer
    x = 122,185.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.