Home / 81,029,473.38-121,544,521.72-19,618,529.78

Finding the Fourth Proportional to 81,029,473.38, 121,544,521.72 and 19,618,529.78

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Solution

The fourth proportional to 81,029,473.38, 121,544,521.72 and 19,618,529.78 is: 29,427,870.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,029,473.38 : 121,544,521.72 = 19,618,529.78 : x
  2. Step 2: Convert to fraction form
    81,029,473.38/121,544,521.72 = 19,618,529.78/x
  3. Step 3: Cross multiply
    81,029,473.38x = 121,544,521.72 × 19,618,529.78
  4. Step 4: Simplify right side
    81,029,473.38x = 2,384,524,819,214,491.50
  5. Step 5: Solve for x
    x = 2,384,524,819,214,491.50/81,029,473.38
  6. Step 6: Final answer
    x = 29,427,870.13

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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.