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Finding the Fourth Proportional to 88.55, 132.78 and 45.17

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Solution

The fourth proportional to 88.55, 132.78 and 45.17 is: 67.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.55 : 132.78 = 45.17 : x
  2. Step 2: Convert to fraction form
    88.55/132.78 = 45.17/x
  3. Step 3: Cross multiply
    88.55x = 132.78 × 45.17
  4. Step 4: Simplify right side
    88.55x = 5,997.67
  5. Step 5: Solve for x
    x = 5,997.67/88.55
  6. Step 6: Final answer
    x = 67.73

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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.