Home / 81,649.20-122,359.76-44,128.40

Finding the Fourth Proportional to 81,649.20, 122,359.76 and 44,128.40

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Solution

The fourth proportional to 81,649.20, 122,359.76 and 44,128.40 is: 66,130.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,649.20 : 122,359.76 = 44,128.40 : x
  2. Step 2: Convert to fraction form
    81,649.20/122,359.76 = 44,128.40/x
  3. Step 3: Cross multiply
    81,649.20x = 122,359.76 × 44,128.40
  4. Step 4: Simplify right side
    81,649.20x = 5,399,540,433.18
  5. Step 5: Solve for x
    x = 5,399,540,433.18/81,649.20
  6. Step 6: Final answer
    x = 66,130.97

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1.5x scale

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.