Home / 113,856.20-170,784.30-80,613.80

Finding the Fourth Proportional to 113,856.20, 170,784.30 and 80,613.80

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Solution

The fourth proportional to 113,856.20, 170,784.30 and 80,613.80 is: 120,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,856.20 : 170,784.30 = 80,613.80 : x
  2. Step 2: Convert to fraction form
    113,856.20/170,784.30 = 80,613.80/x
  3. Step 3: Cross multiply
    113,856.20x = 170,784.30 × 80,613.80
  4. Step 4: Simplify right side
    113,856.20x = 13,767,571,403.34
  5. Step 5: Solve for x
    x = 13,767,571,403.34/113,856.20
  6. Step 6: Final answer
    x = 120,920.70

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1.5x scale

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.