Home / 84,720.56-127,043.92-28,550.20

Finding the Fourth Proportional to 84,720.56, 127,043.92 and 28,550.20

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Solution

The fourth proportional to 84,720.56, 127,043.92 and 28,550.20 is: 42,812.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,720.56 : 127,043.92 = 28,550.20 : x
  2. Step 2: Convert to fraction form
    84,720.56/127,043.92 = 28,550.20/x
  3. Step 3: Cross multiply
    84,720.56x = 127,043.92 × 28,550.20
  4. Step 4: Simplify right side
    84,720.56x = 3,627,129,324.78
  5. Step 5: Solve for x
    x = 3,627,129,324.78/84,720.56
  6. Step 6: Final answer
    x = 42,812.86

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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.