Home / 80,765.10-121,104.45-28,176.30

Finding the Fourth Proportional to 80,765.10, 121,104.45 and 28,176.30

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Solution

The fourth proportional to 80,765.10, 121,104.45 and 28,176.30 is: 42,249.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,765.10 : 121,104.45 = 28,176.30 : x
  2. Step 2: Convert to fraction form
    80,765.10/121,104.45 = 28,176.30/x
  3. Step 3: Cross multiply
    80,765.10x = 121,104.45 × 28,176.30
  4. Step 4: Simplify right side
    80,765.10x = 3,412,275,314.54
  5. Step 5: Solve for x
    x = 3,412,275,314.54/80,765.10
  6. Step 6: Final answer
    x = 42,249.38

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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.