Home / 78,170.10-107,869.62-49,872.75

Finding the Fourth Proportional to 78,170.10, 107,869.62 and 49,872.75

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Solution

The fourth proportional to 78,170.10, 107,869.62 and 49,872.75 is: 68,821.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,170.10 : 107,869.62 = 49,872.75 : x
  2. Step 2: Convert to fraction form
    78,170.10/107,869.62 = 49,872.75/x
  3. Step 3: Cross multiply
    78,170.10x = 107,869.62 × 49,872.75
  4. Step 4: Simplify right side
    78,170.10x = 5,379,754,590.86
  5. Step 5: Solve for x
    x = 5,379,754,590.86/78,170.10
  6. Step 6: Final answer
    x = 68,821.13

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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.