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Finding the Fourth Proportional to 129,691.70, 194,429.55 and 54,869.30

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Solution

The fourth proportional to 129,691.70, 194,429.55 and 54,869.30 is: 82,258.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,691.70 : 194,429.55 = 54,869.30 : x
  2. Step 2: Convert to fraction form
    129,691.70/194,429.55 = 54,869.30/x
  3. Step 3: Cross multiply
    129,691.70x = 194,429.55 × 54,869.30
  4. Step 4: Simplify right side
    129,691.70x = 10,668,213,307.82
  5. Step 5: Solve for x
    x = 10,668,213,307.82/129,691.70
  6. Step 6: Final answer
    x = 82,258.26

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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.