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Finding the Fourth Proportional to 115.06, 158.37 and 104.12

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Solution

The fourth proportional to 115.06, 158.37 and 104.12 is: 143.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.06 : 158.37 = 104.12 : x
  2. Step 2: Convert to fraction form
    115.06/158.37 = 104.12/x
  3. Step 3: Cross multiply
    115.06x = 158.37 × 104.12
  4. Step 4: Simplify right side
    115.06x = 16,489.48
  5. Step 5: Solve for x
    x = 16,489.48/115.06
  6. Step 6: Final answer
    x = 143.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.