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Finding the Fourth Proportional to 68,837.78, 94,987.68 and 40,538

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Solution

The fourth proportional to 68,837.78, 94,987.68 and 40,538 is: 55,937.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,837.78 : 94,987.68 = 40,538 : x
  2. Step 2: Convert to fraction form
    68,837.78/94,987.68 = 40,538/x
  3. Step 3: Cross multiply
    68,837.78x = 94,987.68 × 40,538
  4. Step 4: Simplify right side
    68,837.78x = 3,850,610,571.84
  5. Step 5: Solve for x
    x = 3,850,610,571.84/68,837.78
  6. Step 6: Final answer
    x = 55,937.46

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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.