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Finding the Fourth Proportional to 130.20, 195.09 and 57.91

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Solution

The fourth proportional to 130.20, 195.09 and 57.91 is: 86.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.20 : 195.09 = 57.91 : x
  2. Step 2: Convert to fraction form
    130.20/195.09 = 57.91/x
  3. Step 3: Cross multiply
    130.20x = 195.09 × 57.91
  4. Step 4: Simplify right side
    130.20x = 11,296.69
  5. Step 5: Solve for x
    x = 11,296.69/130.20
  6. Step 6: Final answer
    x = 86.77

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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.