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Finding the Fourth Proportional to 88.98, 132.88 and 71.89

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Solution

The fourth proportional to 88.98, 132.88 and 71.89 is: 107.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.98 : 132.88 = 71.89 : x
  2. Step 2: Convert to fraction form
    88.98/132.88 = 71.89/x
  3. Step 3: Cross multiply
    88.98x = 132.88 × 71.89
  4. Step 4: Simplify right side
    88.98x = 9,552.74
  5. Step 5: Solve for x
    x = 9,552.74/88.98
  6. Step 6: Final answer
    x = 107.36

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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.