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Finding the Fourth Proportional to 177.12, 243.81 and 130.41

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Solution

The fourth proportional to 177.12, 243.81 and 130.41 is: 179.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    177.12 : 243.81 = 130.41 : x
  2. Step 2: Convert to fraction form
    177.12/243.81 = 130.41/x
  3. Step 3: Cross multiply
    177.12x = 243.81 × 130.41
  4. Step 4: Simplify right side
    177.12x = 31,795.26
  5. Step 5: Solve for x
    x = 31,795.26/177.12
  6. Step 6: Final answer
    x = 179.51

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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.