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Finding the Fourth Proportional to 130.55, 194.81 and 129.65

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Solution

The fourth proportional to 130.55, 194.81 and 129.65 is: 193.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.55 : 194.81 = 129.65 : x
  2. Step 2: Convert to fraction form
    130.55/194.81 = 129.65/x
  3. Step 3: Cross multiply
    130.55x = 194.81 × 129.65
  4. Step 4: Simplify right side
    130.55x = 25,257.12
  5. Step 5: Solve for x
    x = 25,257.12/130.55
  6. Step 6: Final answer
    x = 193.47

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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.