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Finding the Fourth Proportional to 94.87, 143.07 and 89.20

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Solution

The fourth proportional to 94.87, 143.07 and 89.20 is: 134.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.87 : 143.07 = 89.20 : x
  2. Step 2: Convert to fraction form
    94.87/143.07 = 89.20/x
  3. Step 3: Cross multiply
    94.87x = 143.07 × 89.20
  4. Step 4: Simplify right side
    94.87x = 12,761.69
  5. Step 5: Solve for x
    x = 12,761.69/94.87
  6. Step 6: Final answer
    x = 134.52

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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.