Home / 80,934.60-121,661.10-57,721.80

Finding the Fourth Proportional to 80,934.60, 121,661.10 and 57,721.80

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Solution

The fourth proportional to 80,934.60, 121,661.10 and 57,721.80 is: 86,767.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,934.60 : 121,661.10 = 57,721.80 : x
  2. Step 2: Convert to fraction form
    80,934.60/121,661.10 = 57,721.80/x
  3. Step 3: Cross multiply
    80,934.60x = 121,661.10 × 57,721.80
  4. Step 4: Simplify right side
    80,934.60x = 7,022,497,681.98
  5. Step 5: Solve for x
    x = 7,022,497,681.98/80,934.60
  6. Step 6: Final answer
    x = 86,767.56

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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.