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Finding the Fourth Proportional to 130.20, 195.39 and 49.11

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Solution

The fourth proportional to 130.20, 195.39 and 49.11 is: 73.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.20 : 195.39 = 49.11 : x
  2. Step 2: Convert to fraction form
    130.20/195.39 = 49.11/x
  3. Step 3: Cross multiply
    130.20x = 195.39 × 49.11
  4. Step 4: Simplify right side
    130.20x = 9,595.60
  5. Step 5: Solve for x
    x = 9,595.60/130.20
  6. Step 6: Final answer
    x = 73.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.