Home / 129,856.20-194,784.30-66,870.60

Finding the Fourth Proportional to 129,856.20, 194,784.30 and 66,870.60

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Solution

The fourth proportional to 129,856.20, 194,784.30 and 66,870.60 is: 100,305.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,856.20 : 194,784.30 = 66,870.60 : x
  2. Step 2: Convert to fraction form
    129,856.20/194,784.30 = 66,870.60/x
  3. Step 3: Cross multiply
    129,856.20x = 194,784.30 × 66,870.60
  4. Step 4: Simplify right side
    129,856.20x = 13,025,343,011.58
  5. Step 5: Solve for x
    x = 13,025,343,011.58/129,856.20
  6. Step 6: Final answer
    x = 100,305.90

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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.