Home / 138,520.35-191,149.84-80,372.59

Finding the Fourth Proportional to 138,520.35, 191,149.84 and 80,372.59

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Solution

The fourth proportional to 138,520.35, 191,149.84 and 80,372.59 is: 110,909.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,520.35 : 191,149.84 = 80,372.59 : x
  2. Step 2: Convert to fraction form
    138,520.35/191,149.84 = 80,372.59/x
  3. Step 3: Cross multiply
    138,520.35x = 191,149.84 × 80,372.59
  4. Step 4: Simplify right side
    138,520.35x = 15,363,207,718.89
  5. Step 5: Solve for x
    x = 15,363,207,718.89/138,520.35
  6. Step 6: Final answer
    x = 110,909.39

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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.