Home / 87,578.40-120,851.24-57,315.78

Finding the Fourth Proportional to 87,578.40, 120,851.24 and 57,315.78

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Solution

The fourth proportional to 87,578.40, 120,851.24 and 57,315.78 is: 79,091.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,578.40 : 120,851.24 = 57,315.78 : x
  2. Step 2: Convert to fraction form
    87,578.40/120,851.24 = 57,315.78/x
  3. Step 3: Cross multiply
    87,578.40x = 120,851.24 × 57,315.78
  4. Step 4: Simplify right side
    87,578.40x = 6,926,682,797.99
  5. Step 5: Solve for x
    x = 6,926,682,797.99/87,578.40
  6. Step 6: Final answer
    x = 79,091.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.