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Finding the Fourth Proportional to 130.11, 193.91 and 129.91

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Solution

The fourth proportional to 130.11, 193.91 and 129.91 is: 193.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.11 : 193.91 = 129.91 : x
  2. Step 2: Convert to fraction form
    130.11/193.91 = 129.91/x
  3. Step 3: Cross multiply
    130.11x = 193.91 × 129.91
  4. Step 4: Simplify right side
    130.11x = 25,190.85
  5. Step 5: Solve for x
    x = 25,190.85/130.11
  6. Step 6: Final answer
    x = 193.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.