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Finding the Fourth Proportional to 80,105.64, 120,176.67 and 42,645.97

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Solution

The fourth proportional to 80,105.64, 120,176.67 and 42,645.97 is: 63,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,105.64 : 120,176.67 = 42,645.97 : x
  2. Step 2: Convert to fraction form
    80,105.64/120,176.67 = 42,645.97/x
  3. Step 3: Cross multiply
    80,105.64x = 120,176.67 × 42,645.97
  4. Step 4: Simplify right side
    80,105.64x = 5,125,050,663.52
  5. Step 5: Solve for x
    x = 5,125,050,663.52/80,105.64
  6. Step 6: Final answer
    x = 63,978.65

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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.