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Finding the Fourth Proportional to 99.52, 149.20 and 51.44

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Solution

The fourth proportional to 99.52, 149.20 and 51.44 is: 77.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.52 : 149.20 = 51.44 : x
  2. Step 2: Convert to fraction form
    99.52/149.20 = 51.44/x
  3. Step 3: Cross multiply
    99.52x = 149.20 × 51.44
  4. Step 4: Simplify right side
    99.52x = 7,674.85
  5. Step 5: Solve for x
    x = 7,674.85/99.52
  6. Step 6: Final answer
    x = 77.12

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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.