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Finding the Fourth Proportional to 130.78, 195.14 and 108.92

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Solution

The fourth proportional to 130.78, 195.14 and 108.92 is: 162.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.78 : 195.14 = 108.92 : x
  2. Step 2: Convert to fraction form
    130.78/195.14 = 108.92/x
  3. Step 3: Cross multiply
    130.78x = 195.14 × 108.92
  4. Step 4: Simplify right side
    130.78x = 21,254.65
  5. Step 5: Solve for x
    x = 21,254.65/130.78
  6. Step 6: Final answer
    x = 162.52

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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.