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Finding the Fourth Proportional to 177.74, 245.19 and 115.54

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Solution

The fourth proportional to 177.74, 245.19 and 115.54 is: 159.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.74 : 245.19 = 115.54 : x
  2. Step 2: Convert to fraction form
    177.74/245.19 = 115.54/x
  3. Step 3: Cross multiply
    177.74x = 245.19 × 115.54
  4. Step 4: Simplify right side
    177.74x = 28,329.25
  5. Step 5: Solve for x
    x = 28,329.25/177.74
  6. Step 6: Final answer
    x = 159.39

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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.