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Finding the Fourth Proportional to 124,038.73, 185,910.45 and 86,394.97

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Solution

The fourth proportional to 124,038.73, 185,910.45 and 86,394.97 is: 129,489.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,038.73 : 185,910.45 = 86,394.97 : x
  2. Step 2: Convert to fraction form
    124,038.73/185,910.45 = 86,394.97/x
  3. Step 3: Cross multiply
    124,038.73x = 185,910.45 × 86,394.97
  4. Step 4: Simplify right side
    124,038.73x = 16,061,727,750.44
  5. Step 5: Solve for x
    x = 16,061,727,750.44/124,038.73
  6. Step 6: Final answer
    x = 129,489.62

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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.