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Finding the Fourth Proportional to 99, 148.56 and 41.22

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Solution

The fourth proportional to 99, 148.56 and 41.22 is: 61.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    99 : 148.56 = 41.22 : x
  2. Step 2: Convert to fraction form
    99/148.56 = 41.22/x
  3. Step 3: Cross multiply
    99x = 148.56 × 41.22
  4. Step 4: Simplify right side
    99x = 6,123.64
  5. Step 5: Solve for x
    x = 6,123.64/99
  6. Step 6: Final answer
    x = 61.85

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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.