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Finding the Fourth Proportional to 129,916.60, 194,874.90 and 103,672.60

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Solution

The fourth proportional to 129,916.60, 194,874.90 and 103,672.60 is: 155,508.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,916.60 : 194,874.90 = 103,672.60 : x
  2. Step 2: Convert to fraction form
    129,916.60/194,874.90 = 103,672.60/x
  3. Step 3: Cross multiply
    129,916.60x = 194,874.90 × 103,672.60
  4. Step 4: Simplify right side
    129,916.60x = 20,203,187,557.74
  5. Step 5: Solve for x
    x = 20,203,187,557.74/129,916.60
  6. Step 6: Final answer
    x = 155,508.90

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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.