Home / 80,778.03-121,165.32-21,613.70

Finding the Fourth Proportional to 80,778.03, 121,165.32 and 21,613.70

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Solution

The fourth proportional to 80,778.03, 121,165.32 and 21,613.70 is: 32,420.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,778.03 : 121,165.32 = 21,613.70 : x
  2. Step 2: Convert to fraction form
    80,778.03/121,165.32 = 21,613.70/x
  3. Step 3: Cross multiply
    80,778.03x = 121,165.32 × 21,613.70
  4. Step 4: Simplify right side
    80,778.03x = 2,618,830,876.88
  5. Step 5: Solve for x
    x = 2,618,830,876.88/80,778.03
  6. Step 6: Final answer
    x = 32,420.09

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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.