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Finding the Fourth Proportional to 247,965.20, 371,947.80 and 129,672.80

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Solution

The fourth proportional to 247,965.20, 371,947.80 and 129,672.80 is: 194,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,965.20 : 371,947.80 = 129,672.80 : x
  2. Step 2: Convert to fraction form
    247,965.20/371,947.80 = 129,672.80/x
  3. Step 3: Cross multiply
    247,965.20x = 371,947.80 × 129,672.80
  4. Step 4: Simplify right side
    247,965.20x = 48,231,512,679.84
  5. Step 5: Solve for x
    x = 48,231,512,679.84/247,965.20
  6. Step 6: Final answer
    x = 194,509.20

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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.