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Finding the Fourth Proportional to 151.15, 225.51 and 129.23

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Solution

The fourth proportional to 151.15, 225.51 and 129.23 is: 192.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.15 : 225.51 = 129.23 : x
  2. Step 2: Convert to fraction form
    151.15/225.51 = 129.23/x
  3. Step 3: Cross multiply
    151.15x = 225.51 × 129.23
  4. Step 4: Simplify right side
    151.15x = 29,142.66
  5. Step 5: Solve for x
    x = 29,142.66/151.15
  6. Step 6: Final answer
    x = 192.81

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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.