Home / 220,245.75-303,913.35-129,581.78

Finding the Fourth Proportional to 220,245.75, 303,913.35 and 129,581.78

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Solution

The fourth proportional to 220,245.75, 303,913.35 and 129,581.78 is: 178,807.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,245.75 : 303,913.35 = 129,581.78 : x
  2. Step 2: Convert to fraction form
    220,245.75/303,913.35 = 129,581.78/x
  3. Step 3: Cross multiply
    220,245.75x = 303,913.35 × 129,581.78
  4. Step 4: Simplify right side
    220,245.75x = 39,381,631,339.20
  5. Step 5: Solve for x
    x = 39,381,631,339.20/220,245.75
  6. Step 6: Final answer
    x = 178,807.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.