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Finding the Fourth Proportional to 106.59, 159.61 and 89.38

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Solution

The fourth proportional to 106.59, 159.61 and 89.38 is: 133.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.59 : 159.61 = 89.38 : x
  2. Step 2: Convert to fraction form
    106.59/159.61 = 89.38/x
  3. Step 3: Cross multiply
    106.59x = 159.61 × 89.38
  4. Step 4: Simplify right side
    106.59x = 14,264.70
  5. Step 5: Solve for x
    x = 14,264.70/106.59
  6. Step 6: Final answer
    x = 133.83

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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.