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Finding the Fourth Proportional to 130.22, 179.72 and 111.86

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Solution

The fourth proportional to 130.22, 179.72 and 111.86 is: 154.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.22 : 179.72 = 111.86 : x
  2. Step 2: Convert to fraction form
    130.22/179.72 = 111.86/x
  3. Step 3: Cross multiply
    130.22x = 179.72 × 111.86
  4. Step 4: Simplify right side
    130.22x = 20,103.48
  5. Step 5: Solve for x
    x = 20,103.48/130.22
  6. Step 6: Final answer
    x = 154.38

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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.