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Finding the Fourth Proportional to 144.55, 216.86 and 63.42

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Solution

The fourth proportional to 144.55, 216.86 and 63.42 is: 95.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.55 : 216.86 = 63.42 : x
  2. Step 2: Convert to fraction form
    144.55/216.86 = 63.42/x
  3. Step 3: Cross multiply
    144.55x = 216.86 × 63.42
  4. Step 4: Simplify right side
    144.55x = 13,753.26
  5. Step 5: Solve for x
    x = 13,753.26/144.55
  6. Step 6: Final answer
    x = 95.15

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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.