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Finding the Fourth Proportional to 130.67, 195.76 and 79.35

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Solution

The fourth proportional to 130.67, 195.76 and 79.35 is: 118.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.67 : 195.76 = 79.35 : x
  2. Step 2: Convert to fraction form
    130.67/195.76 = 79.35/x
  3. Step 3: Cross multiply
    130.67x = 195.76 × 79.35
  4. Step 4: Simplify right side
    130.67x = 15,533.56
  5. Step 5: Solve for x
    x = 15,533.56/130.67
  6. Step 6: Final answer
    x = 118.88

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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.