Home / 100,876.41-139,209.87-57,857.57

Finding the Fourth Proportional to 100,876.41, 139,209.87 and 57,857.57

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Solution

The fourth proportional to 100,876.41, 139,209.87 and 57,857.57 is: 79,843.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,876.41 : 139,209.87 = 57,857.57 : x
  2. Step 2: Convert to fraction form
    100,876.41/139,209.87 = 57,857.57/x
  3. Step 3: Cross multiply
    100,876.41x = 139,209.87 × 57,857.57
  4. Step 4: Simplify right side
    100,876.41x = 8,054,344,102.17
  5. Step 5: Solve for x
    x = 8,054,344,102.17/100,876.41
  6. Step 6: Final answer
    x = 79,843.68

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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.