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Finding the Fourth Proportional to 68,704.66, 103,056.16 and 38,721.16

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Solution

The fourth proportional to 68,704.66, 103,056.16 and 38,721.16 is: 58,081.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,704.66 : 103,056.16 = 38,721.16 : x
  2. Step 2: Convert to fraction form
    68,704.66/103,056.16 = 38,721.16/x
  3. Step 3: Cross multiply
    68,704.66x = 103,056.16 × 38,721.16
  4. Step 4: Simplify right side
    68,704.66x = 3,990,454,060.35
  5. Step 5: Solve for x
    x = 3,990,454,060.35/68,704.66
  6. Step 6: Final answer
    x = 58,081.27

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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.