Home / 68,091.20-93,965.60-39,791.28

Finding the Fourth Proportional to 68,091.20, 93,965.60 and 39,791.28

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Solution

The fourth proportional to 68,091.20, 93,965.60 and 39,791.28 is: 54,911.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,091.20 : 93,965.60 = 39,791.28 : x
  2. Step 2: Convert to fraction form
    68,091.20/93,965.60 = 39,791.28/x
  3. Step 3: Cross multiply
    68,091.20x = 93,965.60 × 39,791.28
  4. Step 4: Simplify right side
    68,091.20x = 3,739,011,499.97
  5. Step 5: Solve for x
    x = 3,739,011,499.97/68,091.20
  6. Step 6: Final answer
    x = 54,911.82

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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.