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Finding the Fourth Proportional to 68,673.28, 94,765.44 and 39,988.48

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Solution

The fourth proportional to 68,673.28, 94,765.44 and 39,988.48 is: 55,181.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,673.28 : 94,765.44 = 39,988.48 : x
  2. Step 2: Convert to fraction form
    68,673.28/94,765.44 = 39,988.48/x
  3. Step 3: Cross multiply
    68,673.28x = 94,765.44 × 39,988.48
  4. Step 4: Simplify right side
    68,673.28x = 3,789,525,902.13
  5. Step 5: Solve for x
    x = 3,789,525,902.13/68,673.28
  6. Step 6: Final answer
    x = 55,181.96

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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.