Home / 149,084.28-205,740-81,105.03

Finding the Fourth Proportional to 149,084.28, 205,740 and 81,105.03

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Solution

The fourth proportional to 149,084.28, 205,740 and 81,105.03 is: 111,926.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,084.28 : 205,740 = 81,105.03 : x
  2. Step 2: Convert to fraction form
    149,084.28/205,740 = 81,105.03/x
  3. Step 3: Cross multiply
    149,084.28x = 205,740 × 81,105.03
  4. Step 4: Simplify right side
    149,084.28x = 16,686,548,872.20
  5. Step 5: Solve for x
    x = 16,686,548,872.20/149,084.28
  6. Step 6: Final answer
    x = 111,926.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.