Home / 83,519.81-125,287.02-21,190.31

Finding the Fourth Proportional to 83,519.81, 125,287.02 and 21,190.31

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Solution

The fourth proportional to 83,519.81, 125,287.02 and 21,190.31 is: 31,787.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,519.81 : 125,287.02 = 21,190.31 : x
  2. Step 2: Convert to fraction form
    83,519.81/125,287.02 = 21,190.31/x
  3. Step 3: Cross multiply
    83,519.81x = 125,287.02 × 21,190.31
  4. Step 4: Simplify right side
    83,519.81x = 2,654,871,105.99
  5. Step 5: Solve for x
    x = 2,654,871,105.99/83,519.81
  6. Step 6: Final answer
    x = 31,787.32

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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.