Home / 129,815.10-194,722.65-85,491.90

Finding the Fourth Proportional to 129,815.10, 194,722.65 and 85,491.90

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Solution

The fourth proportional to 129,815.10, 194,722.65 and 85,491.90 is: 128,237.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,815.10 : 194,722.65 = 85,491.90 : x
  2. Step 2: Convert to fraction form
    129,815.10/194,722.65 = 85,491.90/x
  3. Step 3: Cross multiply
    129,815.10x = 194,722.65 × 85,491.90
  4. Step 4: Simplify right side
    129,815.10x = 16,647,209,321.54
  5. Step 5: Solve for x
    x = 16,647,209,321.54/129,815.10
  6. Step 6: Final answer
    x = 128,237.85

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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.