Home / 80,839.62-121,243.02-21,661.46

Finding the Fourth Proportional to 80,839.62, 121,243.02 and 21,661.46

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Solution

The fourth proportional to 80,839.62, 121,243.02 and 21,661.46 is: 32,487.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,839.62 : 121,243.02 = 21,661.46 : x
  2. Step 2: Convert to fraction form
    80,839.62/121,243.02 = 21,661.46/x
  3. Step 3: Cross multiply
    80,839.62x = 121,243.02 × 21,661.46
  4. Step 4: Simplify right side
    80,839.62x = 2,626,300,828.01
  5. Step 5: Solve for x
    x = 2,626,300,828.01/80,839.62
  6. Step 6: Final answer
    x = 32,487.79

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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.