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Finding the Fourth Proportional to 130.66, 179.12 and 127.21

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Solution

The fourth proportional to 130.66, 179.12 and 127.21 is: 174.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.66 : 179.12 = 127.21 : x
  2. Step 2: Convert to fraction form
    130.66/179.12 = 127.21/x
  3. Step 3: Cross multiply
    130.66x = 179.12 × 127.21
  4. Step 4: Simplify right side
    130.66x = 22,785.86
  5. Step 5: Solve for x
    x = 22,785.86/130.66
  6. Step 6: Final answer
    x = 174.39

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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.