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Finding the Fourth Proportional to 68,703.77, 103,054.84 and 38,720.27

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Solution

The fourth proportional to 68,703.77, 103,054.84 and 38,720.27 is: 58,079.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,703.77 : 103,054.84 = 38,720.27 : x
  2. Step 2: Convert to fraction form
    68,703.77/103,054.84 = 38,720.27/x
  3. Step 3: Cross multiply
    68,703.77x = 103,054.84 × 38,720.27
  4. Step 4: Simplify right side
    68,703.77x = 3,990,311,229.61
  5. Step 5: Solve for x
    x = 3,990,311,229.61/68,703.77
  6. Step 6: Final answer
    x = 58,079.95

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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.