Home / 54,159.12-81,217.14-20,860.80

Finding the Fourth Proportional to 54,159.12, 81,217.14 and 20,860.80

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Solution

The fourth proportional to 54,159.12, 81,217.14 and 20,860.80 is: 31,282.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,159.12 : 81,217.14 = 20,860.80 : x
  2. Step 2: Convert to fraction form
    54,159.12/81,217.14 = 20,860.80/x
  3. Step 3: Cross multiply
    54,159.12x = 81,217.14 × 20,860.80
  4. Step 4: Simplify right side
    54,159.12x = 1,694,254,514.11
  5. Step 5: Solve for x
    x = 1,694,254,514.11/54,159.12
  6. Step 6: Final answer
    x = 31,282.90

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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.