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Finding the Fourth Proportional to 103,432.80, 155,003.40 and 63,872.40

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Solution

The fourth proportional to 103,432.80, 155,003.40 and 63,872.40 is: 95,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,432.80 : 155,003.40 = 63,872.40 : x
  2. Step 2: Convert to fraction form
    103,432.80/155,003.40 = 63,872.40/x
  3. Step 3: Cross multiply
    103,432.80x = 155,003.40 × 63,872.40
  4. Step 4: Simplify right side
    103,432.80x = 9,900,439,166.16
  5. Step 5: Solve for x
    x = 9,900,439,166.16/103,432.80
  6. Step 6: Final answer
    x = 95,718.56

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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.