Home / 81,192,419.70-121,788,629.55-20,608,145.70

Finding the Fourth Proportional to 81,192,419.70, 121,788,629.55 and 20,608,145.70

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Solution

The fourth proportional to 81,192,419.70, 121,788,629.55 and 20,608,145.70 is: 30,912,218.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,192,419.70 : 121,788,629.55 = 20,608,145.70 : x
  2. Step 2: Convert to fraction form
    81,192,419.70/121,788,629.55 = 20,608,145.70/x
  3. Step 3: Cross multiply
    81,192,419.70x = 121,788,629.55 × 20,608,145.70
  4. Step 4: Simplify right side
    81,192,419.70x = 2,509,837,822,369,725.50
  5. Step 5: Solve for x
    x = 2,509,837,822,369,725.50/81,192,419.70
  6. Step 6: Final answer
    x = 30,912,218.55

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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.