Home / 81,029,474.38-121,544,523.22-19,618,530.78

Finding the Fourth Proportional to 81,029,474.38, 121,544,523.22 and 19,618,530.78

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Solution

The fourth proportional to 81,029,474.38, 121,544,523.22 and 19,618,530.78 is: 29,427,871.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029,474.38 : 121,544,523.22 = 19,618,530.78 : x
  2. Step 2: Convert to fraction form
    81,029,474.38/121,544,523.22 = 19,618,530.78/x
  3. Step 3: Cross multiply
    81,029,474.38x = 121,544,523.22 × 19,618,530.78
  4. Step 4: Simplify right side
    81,029,474.38x = 2,384,524,969,931,995
  5. Step 5: Solve for x
    x = 2,384,524,969,931,995/81,029,474.38
  6. Step 6: Final answer
    x = 29,427,871.63

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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.