Home / 87,918.80-131,878.20-28,740.20

Finding the Fourth Proportional to 87,918.80, 131,878.20 and 28,740.20

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Solution

The fourth proportional to 87,918.80, 131,878.20 and 28,740.20 is: 43,110.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,918.80 : 131,878.20 = 28,740.20 : x
  2. Step 2: Convert to fraction form
    87,918.80/131,878.20 = 28,740.20/x
  3. Step 3: Cross multiply
    87,918.80x = 131,878.20 × 28,740.20
  4. Step 4: Simplify right side
    87,918.80x = 3,790,205,843.64
  5. Step 5: Solve for x
    x = 3,790,205,843.64/87,918.80
  6. Step 6: Final answer
    x = 43,110.30

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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.