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Finding the Fourth Proportional to 80,882.40, 121,327.20 and 30,986.40

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Solution

The fourth proportional to 80,882.40, 121,327.20 and 30,986.40 is: 46,480.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,882.40 : 121,327.20 = 30,986.40 : x
  2. Step 2: Convert to fraction form
    80,882.40/121,327.20 = 30,986.40/x
  3. Step 3: Cross multiply
    80,882.40x = 121,327.20 × 30,986.40
  4. Step 4: Simplify right side
    80,882.40x = 3,759,493,150.08
  5. Step 5: Solve for x
    x = 3,759,493,150.08/80,882.40
  6. Step 6: Final answer
    x = 46,480.98

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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.