Home / 78,938.26-108,936.22-43,129.78

Finding the Fourth Proportional to 78,938.26, 108,936.22 and 43,129.78

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Solution

The fourth proportional to 78,938.26, 108,936.22 and 43,129.78 is: 59,519.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,938.26 : 108,936.22 = 43,129.78 : x
  2. Step 2: Convert to fraction form
    78,938.26/108,936.22 = 43,129.78/x
  3. Step 3: Cross multiply
    78,938.26x = 108,936.22 × 43,129.78
  4. Step 4: Simplify right side
    78,938.26x = 4,698,395,202.63
  5. Step 5: Solve for x
    x = 4,698,395,202.63/78,938.26
  6. Step 6: Final answer
    x = 59,519.87

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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.