Home / 54,156.24-81,212.76-20,857.68

Finding the Fourth Proportional to 54,156.24, 81,212.76 and 20,857.68

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Solution

The fourth proportional to 54,156.24, 81,212.76 and 20,857.68 is: 31,278.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,156.24 : 81,212.76 = 20,857.68 : x
  2. Step 2: Convert to fraction form
    54,156.24/81,212.76 = 20,857.68/x
  3. Step 3: Cross multiply
    54,156.24x = 81,212.76 × 20,857.68
  4. Step 4: Simplify right side
    54,156.24x = 1,693,909,760.00
  5. Step 5: Solve for x
    x = 1,693,909,760.00/54,156.24
  6. Step 6: Final answer
    x = 31,278.20

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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.