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Finding the Fourth Proportional to 79,520.42, 119,277.90 and 20,356.61

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Solution

The fourth proportional to 79,520.42, 119,277.90 and 20,356.61 is: 30,534.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,520.42 : 119,277.90 = 20,356.61 : x
  2. Step 2: Convert to fraction form
    79,520.42/119,277.90 = 20,356.61/x
  3. Step 3: Cross multiply
    79,520.42x = 119,277.90 × 20,356.61
  4. Step 4: Simplify right side
    79,520.42x = 2,428,093,691.92
  5. Step 5: Solve for x
    x = 2,428,093,691.92/79,520.42
  6. Step 6: Final answer
    x = 30,534.22

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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.