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Finding the Fourth Proportional to 88.61, 132.80 and 61.50

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Solution

The fourth proportional to 88.61, 132.80 and 61.50 is: 92.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.61 : 132.80 = 61.50 : x
  2. Step 2: Convert to fraction form
    88.61/132.80 = 61.50/x
  3. Step 3: Cross multiply
    88.61x = 132.80 × 61.50
  4. Step 4: Simplify right side
    88.61x = 8,167.35
  5. Step 5: Solve for x
    x = 8,167.35/88.61
  6. Step 6: Final answer
    x = 92.17

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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.