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Finding the Fourth Proportional to 88.43, 133.17 and 77.15

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Solution

The fourth proportional to 88.43, 133.17 and 77.15 is: 116.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.43 : 133.17 = 77.15 : x
  2. Step 2: Convert to fraction form
    88.43/133.17 = 77.15/x
  3. Step 3: Cross multiply
    88.43x = 133.17 × 77.15
  4. Step 4: Simplify right side
    88.43x = 10,274.40
  5. Step 5: Solve for x
    x = 10,274.40/88.43
  6. Step 6: Final answer
    x = 116.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.