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Finding the Fourth Proportional to 130.13, 195.19 and 78.83

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Solution

The fourth proportional to 130.13, 195.19 and 78.83 is: 118.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.13 : 195.19 = 78.83 : x
  2. Step 2: Convert to fraction form
    130.13/195.19 = 78.83/x
  3. Step 3: Cross multiply
    130.13x = 195.19 × 78.83
  4. Step 4: Simplify right side
    130.13x = 15,385.65
  5. Step 5: Solve for x
    x = 15,385.65/130.13
  6. Step 6: Final answer
    x = 118.24

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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.