Home / 54,140.81-81,180.05-20,856.55

Finding the Fourth Proportional to 54,140.81, 81,180.05 and 20,856.55

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Solution

The fourth proportional to 54,140.81, 81,180.05 and 20,856.55 is: 31,272.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,140.81 : 81,180.05 = 20,856.55 : x
  2. Step 2: Convert to fraction form
    54,140.81/81,180.05 = 20,856.55/x
  3. Step 3: Cross multiply
    54,140.81x = 81,180.05 × 20,856.55
  4. Step 4: Simplify right side
    54,140.81x = 1,693,135,447.15
  5. Step 5: Solve for x
    x = 1,693,135,447.15/54,140.81
  6. Step 6: Final answer
    x = 31,272.81

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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.