Home / 138,041.76-206,940.24-81,743.52

Finding the Fourth Proportional to 138,041.76, 206,940.24 and 81,743.52

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Solution

The fourth proportional to 138,041.76, 206,940.24 and 81,743.52 is: 122,542.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,041.76 : 206,940.24 = 81,743.52 : x
  2. Step 2: Convert to fraction form
    138,041.76/206,940.24 = 81,743.52/x
  3. Step 3: Cross multiply
    138,041.76x = 206,940.24 × 81,743.52
  4. Step 4: Simplify right side
    138,041.76x = 16,916,023,647.24
  5. Step 5: Solve for x
    x = 16,916,023,647.24/138,041.76
  6. Step 6: Final answer
    x = 122,542.80

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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.