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Finding the Fourth Proportional to 95.79, 142.98 and 87.67

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Solution

The fourth proportional to 95.79, 142.98 and 87.67 is: 130.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    95.79 : 142.98 = 87.67 : x
  2. Step 2: Convert to fraction form
    95.79/142.98 = 87.67/x
  3. Step 3: Cross multiply
    95.79x = 142.98 × 87.67
  4. Step 4: Simplify right side
    95.79x = 12,535.40
  5. Step 5: Solve for x
    x = 12,535.40/95.79
  6. Step 6: Final answer
    x = 130.87

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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.