Home / 80,119.43-120,185.98-20,955.00

Finding the Fourth Proportional to 80,119.43, 120,185.98 and 20,955.00

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Solution

The fourth proportional to 80,119.43, 120,185.98 and 20,955.00 is: 31,434.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,119.43 : 120,185.98 = 20,955.00 : x
  2. Step 2: Convert to fraction form
    80,119.43/120,185.98 = 20,955.00/x
  3. Step 3: Cross multiply
    80,119.43x = 120,185.98 × 20,955.00
  4. Step 4: Simplify right side
    80,119.43x = 2,518,497,609.21
  5. Step 5: Solve for x
    x = 2,518,497,609.21/80,119.43
  6. Step 6: Final answer
    x = 31,434.29

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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.