Home / 81,007.20-121,251.60-74,786.40

Finding the Fourth Proportional to 81,007.20, 121,251.60 and 74,786.40

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Solution

The fourth proportional to 81,007.20, 121,251.60 and 74,786.40 is: 111,940.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,007.20 : 121,251.60 = 74,786.40 : x
  2. Step 2: Convert to fraction form
    81,007.20/121,251.60 = 74,786.40/x
  3. Step 3: Cross multiply
    81,007.20x = 121,251.60 × 74,786.40
  4. Step 4: Simplify right side
    81,007.20x = 9,067,970,658.24
  5. Step 5: Solve for x
    x = 9,067,970,658.24/81,007.20
  6. Step 6: Final answer
    x = 111,940.30

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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.