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Finding the Fourth Proportional to 153.74, 230.49 and 124.78

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Solution

The fourth proportional to 153.74, 230.49 and 124.78 is: 187.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.74 : 230.49 = 124.78 : x
  2. Step 2: Convert to fraction form
    153.74/230.49 = 124.78/x
  3. Step 3: Cross multiply
    153.74x = 230.49 × 124.78
  4. Step 4: Simplify right side
    153.74x = 28,760.69
  5. Step 5: Solve for x
    x = 28,760.69/153.74
  6. Step 6: Final answer
    x = 187.07

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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.