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Finding the Fourth Proportional to 106.03, 159.41 and 85.88

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Solution

The fourth proportional to 106.03, 159.41 and 85.88 is: 129.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.03 : 159.41 = 85.88 : x
  2. Step 2: Convert to fraction form
    106.03/159.41 = 85.88/x
  3. Step 3: Cross multiply
    106.03x = 159.41 × 85.88
  4. Step 4: Simplify right side
    106.03x = 13,689.70
  5. Step 5: Solve for x
    x = 13,689.70/106.03
  6. Step 6: Final answer
    x = 129.12

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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.