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Finding the Fourth Proportional to 125.55, 187.47 and 115.83

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Solution

The fourth proportional to 125.55, 187.47 and 115.83 is: 172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.55 : 187.47 = 115.83 : x
  2. Step 2: Convert to fraction form
    125.55/187.47 = 115.83/x
  3. Step 3: Cross multiply
    125.55x = 187.47 × 115.83
  4. Step 4: Simplify right side
    125.55x = 21,714.65
  5. Step 5: Solve for x
    x = 21,714.65/125.55
  6. Step 6: Final answer
    x = 172.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.