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Finding the Fourth Proportional to 130.41, 194.71 and 129.11

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Solution

The fourth proportional to 130.41, 194.71 and 129.11 is: 192.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.41 : 194.71 = 129.11 : x
  2. Step 2: Convert to fraction form
    130.41/194.71 = 129.11/x
  3. Step 3: Cross multiply
    130.41x = 194.71 × 129.11
  4. Step 4: Simplify right side
    130.41x = 25,139.01
  5. Step 5: Solve for x
    x = 25,139.01/130.41
  6. Step 6: Final answer
    x = 192.77

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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.