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Finding the Fourth Proportional to 88.52, 133.52 and 86.28

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Solution

The fourth proportional to 88.52, 133.52 and 86.28 is: 130.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    88.52 : 133.52 = 86.28 : x
  2. Step 2: Convert to fraction form
    88.52/133.52 = 86.28/x
  3. Step 3: Cross multiply
    88.52x = 133.52 × 86.28
  4. Step 4: Simplify right side
    88.52x = 11,519.67
  5. Step 5: Solve for x
    x = 11,519.67/88.52
  6. Step 6: Final answer
    x = 130.14

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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.