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Finding the Fourth Proportional to 148,951.71, 205,541.15 and 87,688.17

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Solution

The fourth proportional to 148,951.71, 205,541.15 and 87,688.17 is: 121,002.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,951.71 : 205,541.15 = 87,688.17 : x
  2. Step 2: Convert to fraction form
    148,951.71/205,541.15 = 87,688.17/x
  3. Step 3: Cross multiply
    148,951.71x = 205,541.15 × 87,688.17
  4. Step 4: Simplify right side
    148,951.71x = 18,023,526,864.75
  5. Step 5: Solve for x
    x = 18,023,526,864.75/148,951.71
  6. Step 6: Final answer
    x = 121,002.48

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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.