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Finding the Fourth Proportional to 99.11, 147.80 and 88.88

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Solution

The fourth proportional to 99.11, 147.80 and 88.88 is: 132.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99.11 : 147.80 = 88.88 : x
  2. Step 2: Convert to fraction form
    99.11/147.80 = 88.88/x
  3. Step 3: Cross multiply
    99.11x = 147.80 × 88.88
  4. Step 4: Simplify right side
    99.11x = 13,135.95
  5. Step 5: Solve for x
    x = 13,135.95/99.11
  6. Step 6: Final answer
    x = 132.54

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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.