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Finding the Fourth Proportional to 125,715.39, 188,691.56 and 45,830.59

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Solution

The fourth proportional to 125,715.39, 188,691.56 and 45,830.59 is: 68,789.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,715.39 : 188,691.56 = 45,830.59 : x
  2. Step 2: Convert to fraction form
    125,715.39/188,691.56 = 45,830.59/x
  3. Step 3: Cross multiply
    125,715.39x = 188,691.56 × 45,830.59
  4. Step 4: Simplify right side
    125,715.39x = 8,647,844,993.80
  5. Step 5: Solve for x
    x = 8,647,844,993.80/125,715.39
  6. Step 6: Final answer
    x = 68,789.07

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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.