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Finding the Fourth Proportional to 129,390.54, 194,160.96 and 54,506.04

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Solution

The fourth proportional to 129,390.54, 194,160.96 and 54,506.04 is: 81,790.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,390.54 : 194,160.96 = 54,506.04 : x
  2. Step 2: Convert to fraction form
    129,390.54/194,160.96 = 54,506.04/x
  3. Step 3: Cross multiply
    129,390.54x = 194,160.96 × 54,506.04
  4. Step 4: Simplify right side
    129,390.54x = 10,582,945,052.20
  5. Step 5: Solve for x
    x = 10,582,945,052.20/129,390.54
  6. Step 6: Final answer
    x = 81,790.72

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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.