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Finding the Fourth Proportional to 95.85, 143.64 and 87.75

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Solution

The fourth proportional to 95.85, 143.64 and 87.75 is: 131.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.85 : 143.64 = 87.75 : x
  2. Step 2: Convert to fraction form
    95.85/143.64 = 87.75/x
  3. Step 3: Cross multiply
    95.85x = 143.64 × 87.75
  4. Step 4: Simplify right side
    95.85x = 12,604.41
  5. Step 5: Solve for x
    x = 12,604.41/95.85
  6. Step 6: Final answer
    x = 131.50

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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.