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Finding the Fourth Proportional to 99.54, 136.56 and 88.62

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Solution

The fourth proportional to 99.54, 136.56 and 88.62 is: 121.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.54 : 136.56 = 88.62 : x
  2. Step 2: Convert to fraction form
    99.54/136.56 = 88.62/x
  3. Step 3: Cross multiply
    99.54x = 136.56 × 88.62
  4. Step 4: Simplify right side
    99.54x = 12,101.95
  5. Step 5: Solve for x
    x = 12,101.95/99.54
  6. Step 6: Final answer
    x = 121.58

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.