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Finding the Fourth Proportional to 130.12, 179.40 and 106.72

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Solution

The fourth proportional to 130.12, 179.40 and 106.72 is: 147.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.12 : 179.40 = 106.72 : x
  2. Step 2: Convert to fraction form
    130.12/179.40 = 106.72/x
  3. Step 3: Cross multiply
    130.12x = 179.40 × 106.72
  4. Step 4: Simplify right side
    130.12x = 19,145.57
  5. Step 5: Solve for x
    x = 19,145.57/130.12
  6. Step 6: Final answer
    x = 147.14

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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.