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Finding the Fourth Proportional to 80,474.19, 120,169.25 and 65,711.94

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Solution

The fourth proportional to 80,474.19, 120,169.25 and 65,711.94 is: 98,125.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,474.19 : 120,169.25 = 65,711.94 : x
  2. Step 2: Convert to fraction form
    80,474.19/120,169.25 = 65,711.94/x
  3. Step 3: Cross multiply
    80,474.19x = 120,169.25 × 65,711.94
  4. Step 4: Simplify right side
    80,474.19x = 7,896,554,217.29
  5. Step 5: Solve for x
    x = 7,896,554,217.29/80,474.19
  6. Step 6: Final answer
    x = 98,125.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.