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Finding the Fourth Proportional to 68,777.88, 103,159.90 and 18,863.00

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Solution

The fourth proportional to 68,777.88, 103,159.90 and 18,863.00 is: 28,292.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,777.88 : 103,159.90 = 18,863.00 : x
  2. Step 2: Convert to fraction form
    68,777.88/103,159.90 = 18,863.00/x
  3. Step 3: Cross multiply
    68,777.88x = 103,159.90 × 18,863.00
  4. Step 4: Simplify right side
    68,777.88x = 1,945,904,677.90
  5. Step 5: Solve for x
    x = 1,945,904,677.90/68,777.88
  6. Step 6: Final answer
    x = 28,292.59

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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.