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Finding the Fourth Proportional to 115.56, 158.60 and 104.58

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Solution

The fourth proportional to 115.56, 158.60 and 104.58 is: 143.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.56 : 158.60 = 104.58 : x
  2. Step 2: Convert to fraction form
    115.56/158.60 = 104.58/x
  3. Step 3: Cross multiply
    115.56x = 158.60 × 104.58
  4. Step 4: Simplify right side
    115.56x = 16,586.65
  5. Step 5: Solve for x
    x = 16,586.65/115.56
  6. Step 6: Final answer
    x = 143.53

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.