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Finding the Fourth Proportional to 130.74, 179.14 and 129.54

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Solution

The fourth proportional to 130.74, 179.14 and 129.54 is: 177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.74 : 179.14 = 129.54 : x
  2. Step 2: Convert to fraction form
    130.74/179.14 = 129.54/x
  3. Step 3: Cross multiply
    130.74x = 179.14 × 129.54
  4. Step 4: Simplify right side
    130.74x = 23,205.80
  5. Step 5: Solve for x
    x = 23,205.80/130.74
  6. Step 6: Final answer
    x = 177.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.