Home / 83,720.82-115,538.74-51,456.84

Finding the Fourth Proportional to 83,720.82, 115,538.74 and 51,456.84

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Solution

The fourth proportional to 83,720.82, 115,538.74 and 51,456.84 is: 71,012.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,720.82 : 115,538.74 = 51,456.84 : x
  2. Step 2: Convert to fraction form
    83,720.82/115,538.74 = 51,456.84/x
  3. Step 3: Cross multiply
    83,720.82x = 115,538.74 × 51,456.84
  4. Step 4: Simplify right side
    83,720.82x = 5,945,258,955.57
  5. Step 5: Solve for x
    x = 5,945,258,955.57/83,720.82
  6. Step 6: Final answer
    x = 71,012.91

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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.