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Finding the Fourth Proportional to 96.02, 143.10 and 86.48

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Solution

The fourth proportional to 96.02, 143.10 and 86.48 is: 128.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    96.02 : 143.10 = 86.48 : x
  2. Step 2: Convert to fraction form
    96.02/143.10 = 86.48/x
  3. Step 3: Cross multiply
    96.02x = 143.10 × 86.48
  4. Step 4: Simplify right side
    96.02x = 12,375.29
  5. Step 5: Solve for x
    x = 12,375.29/96.02
  6. Step 6: Final answer
    x = 128.88

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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.