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Finding the Fourth Proportional to 247,474.12, 371,265.72 and 105,311.80

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Solution

The fourth proportional to 247,474.12, 371,265.72 and 105,311.80 is: 157,990.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,474.12 : 371,265.72 = 105,311.80 : x
  2. Step 2: Convert to fraction form
    247,474.12/371,265.72 = 105,311.80/x
  3. Step 3: Cross multiply
    247,474.12x = 371,265.72 × 105,311.80
  4. Step 4: Simplify right side
    247,474.12x = 39,098,661,251.50
  5. Step 5: Solve for x
    x = 39,098,661,251.50/247,474.12
  6. Step 6: Final answer
    x = 157,990.91

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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.