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Finding the Fourth Proportional to 130.16, 179.38 and 106.76

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Solution

The fourth proportional to 130.16, 179.38 and 106.76 is: 147.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.16 : 179.38 = 106.76 : x
  2. Step 2: Convert to fraction form
    130.16/179.38 = 106.76/x
  3. Step 3: Cross multiply
    130.16x = 179.38 × 106.76
  4. Step 4: Simplify right side
    130.16x = 19,150.61
  5. Step 5: Solve for x
    x = 19,150.61/130.16
  6. Step 6: Final answer
    x = 147.13

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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.