Home / 54,188.13-81,289.12-20,917.71

Finding the Fourth Proportional to 54,188.13, 81,289.12 and 20,917.71

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Solution

The fourth proportional to 54,188.13, 81,289.12 and 20,917.71 is: 31,379.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,188.13 : 81,289.12 = 20,917.71 : x
  2. Step 2: Convert to fraction form
    54,188.13/81,289.12 = 20,917.71/x
  3. Step 3: Cross multiply
    54,188.13x = 81,289.12 × 20,917.71
  4. Step 4: Simplify right side
    54,188.13x = 1,700,381,727.28
  5. Step 5: Solve for x
    x = 1,700,381,727.28/54,188.13
  6. Step 6: Final answer
    x = 31,379.23

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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.