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Finding the Fourth Proportional to 130.55, 194.72 and 116.87

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Solution

The fourth proportional to 130.55, 194.72 and 116.87 is: 174.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.55 : 194.72 = 116.87 : x
  2. Step 2: Convert to fraction form
    130.55/194.72 = 116.87/x
  3. Step 3: Cross multiply
    130.55x = 194.72 × 116.87
  4. Step 4: Simplify right side
    130.55x = 22,755.37
  5. Step 5: Solve for x
    x = 22,755.37/130.55
  6. Step 6: Final answer
    x = 174.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.