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Finding the Fourth Proportional to 130.05, 179.30 and 106.71

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Solution

The fourth proportional to 130.05, 179.30 and 106.71 is: 147.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.05 : 179.30 = 106.71 : x
  2. Step 2: Convert to fraction form
    130.05/179.30 = 106.71/x
  3. Step 3: Cross multiply
    130.05x = 179.30 × 106.71
  4. Step 4: Simplify right side
    130.05x = 19,133.10
  5. Step 5: Solve for x
    x = 19,133.10/130.05
  6. Step 6: Final answer
    x = 147.12

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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.