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Finding the Fourth Proportional to 129,791.10, 194,686.65 and 79,708.80

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Solution

The fourth proportional to 129,791.10, 194,686.65 and 79,708.80 is: 119,563.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,791.10 : 194,686.65 = 79,708.80 : x
  2. Step 2: Convert to fraction form
    129,791.10/194,686.65 = 79,708.80/x
  3. Step 3: Cross multiply
    129,791.10x = 194,686.65 × 79,708.80
  4. Step 4: Simplify right side
    129,791.10x = 15,518,239,247.52
  5. Step 5: Solve for x
    x = 15,518,239,247.52/129,791.10
  6. Step 6: Final answer
    x = 119,563.20

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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.