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Finding the Fourth Proportional to 130.05, 194.96 and 61.61

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Solution

The fourth proportional to 130.05, 194.96 and 61.61 is: 92.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.05 : 194.96 = 61.61 : x
  2. Step 2: Convert to fraction form
    130.05/194.96 = 61.61/x
  3. Step 3: Cross multiply
    130.05x = 194.96 × 61.61
  4. Step 4: Simplify right side
    130.05x = 12,010.20
  5. Step 5: Solve for x
    x = 12,010.20/130.05
  6. Step 6: Final answer
    x = 92.35

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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.