Home / 78,172.10-107,872.38-49,874.75

Finding the Fourth Proportional to 78,172.10, 107,872.38 and 49,874.75

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Solution

The fourth proportional to 78,172.10, 107,872.38 and 49,874.75 is: 68,823.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,172.10 : 107,872.38 = 49,874.75 : x
  2. Step 2: Convert to fraction form
    78,172.10/107,872.38 = 49,874.75/x
  3. Step 3: Cross multiply
    78,172.10x = 107,872.38 × 49,874.75
  4. Step 4: Simplify right side
    78,172.10x = 5,380,107,984.41
  5. Step 5: Solve for x
    x = 5,380,107,984.41/78,172.10
  6. Step 6: Final answer
    x = 68,823.89

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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.