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Finding the Fourth Proportional to 174.55, 261.46 and 142.15

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Solution

The fourth proportional to 174.55, 261.46 and 142.15 is: 212.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    174.55 : 261.46 = 142.15 : x
  2. Step 2: Convert to fraction form
    174.55/261.46 = 142.15/x
  3. Step 3: Cross multiply
    174.55x = 261.46 × 142.15
  4. Step 4: Simplify right side
    174.55x = 37,166.54
  5. Step 5: Solve for x
    x = 37,166.54/174.55
  6. Step 6: Final answer
    x = 212.93

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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.