Home / 81,106.88-121,660.20-25,698.56

Finding the Fourth Proportional to 81,106.88, 121,660.20 and 25,698.56

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Solution

The fourth proportional to 81,106.88, 121,660.20 and 25,698.56 is: 38,547.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,106.88 : 121,660.20 = 25,698.56 : x
  2. Step 2: Convert to fraction form
    81,106.88/121,660.20 = 25,698.56/x
  3. Step 3: Cross multiply
    81,106.88x = 121,660.20 × 25,698.56
  4. Step 4: Simplify right side
    81,106.88x = 3,126,491,949.31
  5. Step 5: Solve for x
    x = 3,126,491,949.31/81,106.88
  6. Step 6: Final answer
    x = 38,547.80

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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.