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Finding the Fourth Proportional to 151.48, 209.02 and 99

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Solution

The fourth proportional to 151.48, 209.02 and 99 is: 136.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    151.48 : 209.02 = 99 : x
  2. Step 2: Convert to fraction form
    151.48/209.02 = 99/x
  3. Step 3: Cross multiply
    151.48x = 209.02 × 99
  4. Step 4: Simplify right side
    151.48x = 20,692.98
  5. Step 5: Solve for x
    x = 20,692.98/151.48
  6. Step 6: Final answer
    x = 136.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.