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Finding the Fourth Proportional to 68,456.88, 102,699.72 and 38,888.40

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Solution

The fourth proportional to 68,456.88, 102,699.72 and 38,888.40 is: 58,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,456.88 : 102,699.72 = 38,888.40 : x
  2. Step 2: Convert to fraction form
    68,456.88/102,699.72 = 38,888.40/x
  3. Step 3: Cross multiply
    68,456.88x = 102,699.72 × 38,888.40
  4. Step 4: Simplify right side
    68,456.88x = 3,993,827,791.25
  5. Step 5: Solve for x
    x = 3,993,827,791.25/68,456.88
  6. Step 6: Final answer
    x = 58,340.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.