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Finding the Fourth Proportional to 129,791.58, 194,866.64 and 89,711.82

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Solution

The fourth proportional to 129,791.58, 194,866.64 and 89,711.82 is: 134,691.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791.58 : 194,866.64 = 89,711.82 : x
  2. Step 2: Convert to fraction form
    129,791.58/194,866.64 = 89,711.82/x
  3. Step 3: Cross multiply
    129,791.58x = 194,866.64 × 89,711.82
  4. Step 4: Simplify right side
    129,791.58x = 17,481,840,931.68
  5. Step 5: Solve for x
    x = 17,481,840,931.68/129,791.58
  6. Step 6: Final answer
    x = 134,691.64

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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.