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Finding the Fourth Proportional to 99.44, 149.84 and 82.70

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Solution

The fourth proportional to 99.44, 149.84 and 82.70 is: 124.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.44 : 149.84 = 82.70 : x
  2. Step 2: Convert to fraction form
    99.44/149.84 = 82.70/x
  3. Step 3: Cross multiply
    99.44x = 149.84 × 82.70
  4. Step 4: Simplify right side
    99.44x = 12,392.35
  5. Step 5: Solve for x
    x = 12,392.35/99.44
  6. Step 6: Final answer
    x = 124.62

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.