Home / 80,904.20-121,334.70-28,308.20

Finding the Fourth Proportional to 80,904.20, 121,334.70 and 28,308.20

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Solution

The fourth proportional to 80,904.20, 121,334.70 and 28,308.20 is: 42,454.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,904.20 : 121,334.70 = 28,308.20 : x
  2. Step 2: Convert to fraction form
    80,904.20/121,334.70 = 28,308.20/x
  3. Step 3: Cross multiply
    80,904.20x = 121,334.70 × 28,308.20
  4. Step 4: Simplify right side
    80,904.20x = 3,434,766,954.54
  5. Step 5: Solve for x
    x = 3,434,766,954.54/80,904.20
  6. Step 6: Final answer
    x = 42,454.74

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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.