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Finding the Fourth Proportional to 125,615.70, 188,423.55 and 112,785.30

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Solution

The fourth proportional to 125,615.70, 188,423.55 and 112,785.30 is: 169,177.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,615.70 : 188,423.55 = 112,785.30 : x
  2. Step 2: Convert to fraction form
    125,615.70/188,423.55 = 112,785.30/x
  3. Step 3: Cross multiply
    125,615.70x = 188,423.55 × 112,785.30
  4. Step 4: Simplify right side
    125,615.70x = 21,251,406,613.82
  5. Step 5: Solve for x
    x = 21,251,406,613.82/125,615.70
  6. Step 6: Final answer
    x = 169,177.95

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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.