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Finding the Fourth Proportional to 99.44, 148.45 and 92.61

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Solution

The fourth proportional to 99.44, 148.45 and 92.61 is: 138.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.44 : 148.45 = 92.61 : x
  2. Step 2: Convert to fraction form
    99.44/148.45 = 92.61/x
  3. Step 3: Cross multiply
    99.44x = 148.45 × 92.61
  4. Step 4: Simplify right side
    99.44x = 13,747.90
  5. Step 5: Solve for x
    x = 13,747.90/99.44
  6. Step 6: Final answer
    x = 138.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.