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Finding the Fourth Proportional to 177.20, 244.55 and 105.39

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Solution

The fourth proportional to 177.20, 244.55 and 105.39 is: 145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.20 : 244.55 = 105.39 : x
  2. Step 2: Convert to fraction form
    177.20/244.55 = 105.39/x
  3. Step 3: Cross multiply
    177.20x = 244.55 × 105.39
  4. Step 4: Simplify right side
    177.20x = 25,773.39
  5. Step 5: Solve for x
    x = 25,773.39/177.20
  6. Step 6: Final answer
    x = 145.45

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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.