Home / 81,004,079.70-121,506,119.55-20,419,805.70

Finding the Fourth Proportional to 81,004,079.70, 121,506,119.55 and 20,419,805.70

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Solution

The fourth proportional to 81,004,079.70, 121,506,119.55 and 20,419,805.70 is: 30,629,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,004,079.70 : 121,506,119.55 = 20,419,805.70 : x
  2. Step 2: Convert to fraction form
    81,004,079.70/121,506,119.55 = 20,419,805.70/x
  3. Step 3: Cross multiply
    81,004,079.70x = 121,506,119.55 × 20,419,805.70
  4. Step 4: Simplify right side
    81,004,079.70x = 2,481,131,352,571,971.50
  5. Step 5: Solve for x
    x = 2,481,131,352,571,971.50/81,004,079.70
  6. Step 6: Final answer
    x = 30,629,708.55

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Similar ratio
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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.