Home / 83,618.36-115,447.40-51,821

Finding the Fourth Proportional to 83,618.36, 115,447.40 and 51,821

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Solution

The fourth proportional to 83,618.36, 115,447.40 and 51,821 is: 71,546.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,618.36 : 115,447.40 = 51,821 : x
  2. Step 2: Convert to fraction form
    83,618.36/115,447.40 = 51,821/x
  3. Step 3: Cross multiply
    83,618.36x = 115,447.40 × 51,821
  4. Step 4: Simplify right side
    83,618.36x = 5,982,599,715.40
  5. Step 5: Solve for x
    x = 5,982,599,715.40/83,618.36
  6. Step 6: Final answer
    x = 71,546.48

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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.