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Finding the Fourth Proportional to 144.72, 216.65 and 93.42

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Solution

The fourth proportional to 144.72, 216.65 and 93.42 is: 139.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    144.72 : 216.65 = 93.42 : x
  2. Step 2: Convert to fraction form
    144.72/216.65 = 93.42/x
  3. Step 3: Cross multiply
    144.72x = 216.65 × 93.42
  4. Step 4: Simplify right side
    144.72x = 20,238.98
  5. Step 5: Solve for x
    x = 20,238.98/144.72
  6. Step 6: Final answer
    x = 139.85

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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.