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Finding the Fourth Proportional to 96.72, 145.09 and 42.62

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Solution

The fourth proportional to 96.72, 145.09 and 42.62 is: 63.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.72 : 145.09 = 42.62 : x
  2. Step 2: Convert to fraction form
    96.72/145.09 = 42.62/x
  3. Step 3: Cross multiply
    96.72x = 145.09 × 42.62
  4. Step 4: Simplify right side
    96.72x = 6,183.74
  5. Step 5: Solve for x
    x = 6,183.74/96.72
  6. Step 6: Final answer
    x = 63.93

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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.