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Finding the Fourth Proportional to 129,885.80, 195,059.10 and 100,375.40

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Solution

The fourth proportional to 129,885.80, 195,059.10 and 100,375.40 is: 150,741.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,885.80 : 195,059.10 = 100,375.40 : x
  2. Step 2: Convert to fraction form
    129,885.80/195,059.10 = 100,375.40/x
  3. Step 3: Cross multiply
    129,885.80x = 195,059.10 × 100,375.40
  4. Step 4: Simplify right side
    129,885.80x = 19,579,135,186.14
  5. Step 5: Solve for x
    x = 19,579,135,186.14/129,885.80
  6. Step 6: Final answer
    x = 150,741.15

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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.