Home / 81,003.20-121,504.80-57,156.80

Finding the Fourth Proportional to 81,003.20, 121,504.80 and 57,156.80

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Solution

The fourth proportional to 81,003.20, 121,504.80 and 57,156.80 is: 85,735.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,003.20 : 121,504.80 = 57,156.80 : x
  2. Step 2: Convert to fraction form
    81,003.20/121,504.80 = 57,156.80/x
  3. Step 3: Cross multiply
    81,003.20x = 121,504.80 × 57,156.80
  4. Step 4: Simplify right side
    81,003.20x = 6,944,825,552.64
  5. Step 5: Solve for x
    x = 6,944,825,552.64/81,003.20
  6. Step 6: Final answer
    x = 85,735.20

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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.