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Finding the Fourth Proportional to 130.93, 195.42 and 115.55

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Solution

The fourth proportional to 130.93, 195.42 and 115.55 is: 172.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.93 : 195.42 = 115.55 : x
  2. Step 2: Convert to fraction form
    130.93/195.42 = 115.55/x
  3. Step 3: Cross multiply
    130.93x = 195.42 × 115.55
  4. Step 4: Simplify right side
    130.93x = 22,580.78
  5. Step 5: Solve for x
    x = 22,580.78/130.93
  6. Step 6: Final answer
    x = 172.47

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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.