Home / 79,640.10-109,857.62-49,780.26

Finding the Fourth Proportional to 79,640.10, 109,857.62 and 49,780.26

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Solution

The fourth proportional to 79,640.10, 109,857.62 and 49,780.26 is: 68,668.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,640.10 : 109,857.62 = 49,780.26 : x
  2. Step 2: Convert to fraction form
    79,640.10/109,857.62 = 49,780.26/x
  3. Step 3: Cross multiply
    79,640.10x = 109,857.62 × 49,780.26
  4. Step 4: Simplify right side
    79,640.10x = 5,468,740,886.58
  5. Step 5: Solve for x
    x = 5,468,740,886.58/79,640.10
  6. Step 6: Final answer
    x = 68,668.18

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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.