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Finding the Fourth Proportional to 177.60, 245.12 and 122.39

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Solution

The fourth proportional to 177.60, 245.12 and 122.39 is: 168.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.60 : 245.12 = 122.39 : x
  2. Step 2: Convert to fraction form
    177.60/245.12 = 122.39/x
  3. Step 3: Cross multiply
    177.60x = 245.12 × 122.39
  4. Step 4: Simplify right side
    177.60x = 30,000.24
  5. Step 5: Solve for x
    x = 30,000.24/177.60
  6. Step 6: Final answer
    x = 168.92

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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.