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Finding the Fourth Proportional to 144.81, 217.68 and 124.77

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Solution

The fourth proportional to 144.81, 217.68 and 124.77 is: 187.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.81 : 217.68 = 124.77 : x
  2. Step 2: Convert to fraction form
    144.81/217.68 = 124.77/x
  3. Step 3: Cross multiply
    144.81x = 217.68 × 124.77
  4. Step 4: Simplify right side
    144.81x = 27,159.93
  5. Step 5: Solve for x
    x = 27,159.93/144.81
  6. Step 6: Final answer
    x = 187.56

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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.