Home / 80,993,816.40-121,490,724.60-20,409,542.40

Finding the Fourth Proportional to 80,993,816.40, 121,490,724.60 and 20,409,542.40

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Solution

The fourth proportional to 80,993,816.40, 121,490,724.60 and 20,409,542.40 is: 30,614,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,993,816.40 : 121,490,724.60 = 20,409,542.40 : x
  2. Step 2: Convert to fraction form
    80,993,816.40/121,490,724.60 = 20,409,542.40/x
  3. Step 3: Cross multiply
    80,993,816.40x = 121,490,724.60 × 20,409,542.40
  4. Step 4: Simplify right side
    80,993,816.40x = 2,479,570,094,930,422.50
  5. Step 5: Solve for x
    x = 2,479,570,094,930,422.50/80,993,816.40
  6. Step 6: Final answer
    x = 30,614,313.60

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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.