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Finding the Fourth Proportional to 68,679.44, 94,779.96 and 40,387.76

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Solution

The fourth proportional to 68,679.44, 94,779.96 and 40,387.76 is: 55,736.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,679.44 : 94,779.96 = 40,387.76 : x
  2. Step 2: Convert to fraction form
    68,679.44/94,779.96 = 40,387.76/x
  3. Step 3: Cross multiply
    68,679.44x = 94,779.96 × 40,387.76
  4. Step 4: Simplify right side
    68,679.44x = 3,827,950,277.29
  5. Step 5: Solve for x
    x = 3,827,950,277.29/68,679.44
  6. Step 6: Final answer
    x = 55,736.48

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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.