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Finding the Fourth Proportional to 88.98, 132.57 and 85.12

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Solution

The fourth proportional to 88.98, 132.57 and 85.12 is: 126.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.98 : 132.57 = 85.12 : x
  2. Step 2: Convert to fraction form
    88.98/132.57 = 85.12/x
  3. Step 3: Cross multiply
    88.98x = 132.57 × 85.12
  4. Step 4: Simplify right side
    88.98x = 11,284.36
  5. Step 5: Solve for x
    x = 11,284.36/88.98
  6. Step 6: Final answer
    x = 126.82

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.