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Finding the Fourth Proportional to 129,882.80, 195,054.60 and 100,372.40

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Solution

The fourth proportional to 129,882.80, 195,054.60 and 100,372.40 is: 150,736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,882.80 : 195,054.60 = 100,372.40 : x
  2. Step 2: Convert to fraction form
    129,882.80/195,054.60 = 100,372.40/x
  3. Step 3: Cross multiply
    129,882.80x = 195,054.60 × 100,372.40
  4. Step 4: Simplify right side
    129,882.80x = 19,578,098,333.04
  5. Step 5: Solve for x
    x = 19,578,098,333.04/129,882.80
  6. Step 6: Final answer
    x = 150,736.65

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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.