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Finding the Fourth Proportional to 124,445.92, 186,630 and 54,306.40

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Solution

The fourth proportional to 124,445.92, 186,630 and 54,306.40 is: 81,442.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,445.92 : 186,630 = 54,306.40 : x
  2. Step 2: Convert to fraction form
    124,445.92/186,630 = 54,306.40/x
  3. Step 3: Cross multiply
    124,445.92x = 186,630 × 54,306.40
  4. Step 4: Simplify right side
    124,445.92x = 10,135,203,432
  5. Step 5: Solve for x
    x = 10,135,203,432/124,445.92
  6. Step 6: Final answer
    x = 81,442.63

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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.