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Finding the Fourth Proportional to 130.56, 195.79 and 39.23

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Solution

The fourth proportional to 130.56, 195.79 and 39.23 is: 58.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.56 : 195.79 = 39.23 : x
  2. Step 2: Convert to fraction form
    130.56/195.79 = 39.23/x
  3. Step 3: Cross multiply
    130.56x = 195.79 × 39.23
  4. Step 4: Simplify right side
    130.56x = 7,680.13
  5. Step 5: Solve for x
    x = 7,680.13/130.56
  6. Step 6: Final answer
    x = 58.82

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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.