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Finding the Fourth Proportional to 88.59, 132.60 and 61.39

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Solution

The fourth proportional to 88.59, 132.60 and 61.39 is: 91.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.59 : 132.60 = 61.39 : x
  2. Step 2: Convert to fraction form
    88.59/132.60 = 61.39/x
  3. Step 3: Cross multiply
    88.59x = 132.60 × 61.39
  4. Step 4: Simplify right side
    88.59x = 8,140.31
  5. Step 5: Solve for x
    x = 8,140.31/88.59
  6. Step 6: Final answer
    x = 91.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.