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Finding the Fourth Proportional to 88.27, 131.66 and 85.57

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Solution

The fourth proportional to 88.27, 131.66 and 85.57 is: 127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.27 : 131.66 = 85.57 : x
  2. Step 2: Convert to fraction form
    88.27/131.66 = 85.57/x
  3. Step 3: Cross multiply
    88.27x = 131.66 × 85.57
  4. Step 4: Simplify right side
    88.27x = 11,266.15
  5. Step 5: Solve for x
    x = 11,266.15/88.27
  6. Step 6: Final answer
    x = 127.63

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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.