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Finding the Fourth Proportional to 125,747.76, 188,616.84 and 42,641.68

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Solution

The fourth proportional to 125,747.76, 188,616.84 and 42,641.68 is: 63,960.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,747.76 : 188,616.84 = 42,641.68 : x
  2. Step 2: Convert to fraction form
    125,747.76/188,616.84 = 42,641.68/x
  3. Step 3: Cross multiply
    125,747.76x = 188,616.84 × 42,641.68
  4. Step 4: Simplify right side
    125,747.76x = 8,042,938,933.89
  5. Step 5: Solve for x
    x = 8,042,938,933.89/125,747.76
  6. Step 6: Final answer
    x = 63,960.89

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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.