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Finding the Fourth Proportional to 89.88, 133.85 and 88.87

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Solution

The fourth proportional to 89.88, 133.85 and 88.87 is: 132.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    89.88 : 133.85 = 88.87 : x
  2. Step 2: Convert to fraction form
    89.88/133.85 = 88.87/x
  3. Step 3: Cross multiply
    89.88x = 133.85 × 88.87
  4. Step 4: Simplify right side
    89.88x = 11,894.14
  5. Step 5: Solve for x
    x = 11,894.14/89.88
  6. Step 6: Final answer
    x = 132.33

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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.