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Finding the Fourth Proportional to 94.87, 131.52 and 89.68

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Solution

The fourth proportional to 94.87, 131.52 and 89.68 is: 124.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.87 : 131.52 = 89.68 : x
  2. Step 2: Convert to fraction form
    94.87/131.52 = 89.68/x
  3. Step 3: Cross multiply
    94.87x = 131.52 × 89.68
  4. Step 4: Simplify right side
    94.87x = 11,794.71
  5. Step 5: Solve for x
    x = 11,794.71/94.87
  6. Step 6: Final answer
    x = 124.32

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.