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Finding the Fourth Proportional to 111,788.52, 154,251.18 and 63,387.78

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Solution

The fourth proportional to 111,788.52, 154,251.18 and 63,387.78 is: 87,465.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,788.52 : 154,251.18 = 63,387.78 : x
  2. Step 2: Convert to fraction form
    111,788.52/154,251.18 = 63,387.78/x
  3. Step 3: Cross multiply
    111,788.52x = 154,251.18 × 63,387.78
  4. Step 4: Simplify right side
    111,788.52x = 9,777,639,862.58
  5. Step 5: Solve for x
    x = 9,777,639,862.58/111,788.52
  6. Step 6: Final answer
    x = 87,465.51

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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.