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Finding the Fourth Proportional to 125,591.78, 188,452.32 and 69,421.46

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Solution

The fourth proportional to 125,591.78, 188,452.32 and 69,421.46 is: 104,167.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,591.78 : 188,452.32 = 69,421.46 : x
  2. Step 2: Convert to fraction form
    125,591.78/188,452.32 = 69,421.46/x
  3. Step 3: Cross multiply
    125,591.78x = 188,452.32 × 69,421.46
  4. Step 4: Simplify right side
    125,591.78x = 13,082,635,194.79
  5. Step 5: Solve for x
    x = 13,082,635,194.79/125,591.78
  6. Step 6: Final answer
    x = 104,167.93

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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.