Home / 80,665.16-120,997.46-20,693.57

Finding the Fourth Proportional to 80,665.16, 120,997.46 and 20,693.57

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Solution

The fourth proportional to 80,665.16, 120,997.46 and 20,693.57 is: 31,040.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,665.16 : 120,997.46 = 20,693.57 : x
  2. Step 2: Convert to fraction form
    80,665.16/120,997.46 = 20,693.57/x
  3. Step 3: Cross multiply
    80,665.16x = 120,997.46 × 20,693.57
  4. Step 4: Simplify right side
    80,665.16x = 2,503,868,855.08
  5. Step 5: Solve for x
    x = 2,503,868,855.08/80,665.16
  6. Step 6: Final answer
    x = 31,040.28

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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.