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Finding the Fourth Proportional to 130.41, 180.18 and 116.61

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Solution

The fourth proportional to 130.41, 180.18 and 116.61 is: 161.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.41 : 180.18 = 116.61 : x
  2. Step 2: Convert to fraction form
    130.41/180.18 = 116.61/x
  3. Step 3: Cross multiply
    130.41x = 180.18 × 116.61
  4. Step 4: Simplify right side
    130.41x = 21,010.79
  5. Step 5: Solve for x
    x = 21,010.79/130.41
  6. Step 6: Final answer
    x = 161.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.