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Finding the Fourth Proportional to 106.04, 158.82 and 85.65

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Solution

The fourth proportional to 106.04, 158.82 and 85.65 is: 128.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    106.04 : 158.82 = 85.65 : x
  2. Step 2: Convert to fraction form
    106.04/158.82 = 85.65/x
  3. Step 3: Cross multiply
    106.04x = 158.82 × 85.65
  4. Step 4: Simplify right side
    106.04x = 13,602.93
  5. Step 5: Solve for x
    x = 13,602.93/106.04
  6. Step 6: Final answer
    x = 128.28

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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.