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Finding the Fourth Proportional to 130.20, 195.26 and 61.66

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Solution

The fourth proportional to 130.20, 195.26 and 61.66 is: 92.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.20 : 195.26 = 61.66 : x
  2. Step 2: Convert to fraction form
    130.20/195.26 = 61.66/x
  3. Step 3: Cross multiply
    130.20x = 195.26 × 61.66
  4. Step 4: Simplify right side
    130.20x = 12,038.76
  5. Step 5: Solve for x
    x = 12,038.76/130.20
  6. Step 6: Final answer
    x = 92.47

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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.