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Finding the Fourth Proportional to 95.93, 143.02 and 86.70

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Solution

The fourth proportional to 95.93, 143.02 and 86.70 is: 129.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.93 : 143.02 = 86.70 : x
  2. Step 2: Convert to fraction form
    95.93/143.02 = 86.70/x
  3. Step 3: Cross multiply
    95.93x = 143.02 × 86.70
  4. Step 4: Simplify right side
    95.93x = 12,400.19
  5. Step 5: Solve for x
    x = 12,400.19/95.93
  6. Step 6: Final answer
    x = 129.27

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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.