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Finding the Fourth Proportional to 95.97, 143.81 and 85.77

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Solution

The fourth proportional to 95.97, 143.81 and 85.77 is: 128.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.97 : 143.81 = 85.77 : x
  2. Step 2: Convert to fraction form
    95.97/143.81 = 85.77/x
  3. Step 3: Cross multiply
    95.97x = 143.81 × 85.77
  4. Step 4: Simplify right side
    95.97x = 12,334.15
  5. Step 5: Solve for x
    x = 12,334.15/95.97
  6. Step 6: Final answer
    x = 128.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.