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Finding the Fourth Proportional to 86.87, 130.97 and 73.44

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Solution

The fourth proportional to 86.87, 130.97 and 73.44 is: 110.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.87 : 130.97 = 73.44 : x
  2. Step 2: Convert to fraction form
    86.87/130.97 = 73.44/x
  3. Step 3: Cross multiply
    86.87x = 130.97 × 73.44
  4. Step 4: Simplify right side
    86.87x = 9,618.44
  5. Step 5: Solve for x
    x = 9,618.44/86.87
  6. Step 6: Final answer
    x = 110.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.