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Finding the Fourth Proportional to 88.26, 133.13 and 76.29

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Solution

The fourth proportional to 88.26, 133.13 and 76.29 is: 115.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.26 : 133.13 = 76.29 : x
  2. Step 2: Convert to fraction form
    88.26/133.13 = 76.29/x
  3. Step 3: Cross multiply
    88.26x = 133.13 × 76.29
  4. Step 4: Simplify right side
    88.26x = 10,156.11
  5. Step 5: Solve for x
    x = 10,156.11/88.26
  6. Step 6: Final answer
    x = 115.07

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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.