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Finding the Fourth Proportional to 68,708, 94,817.05 and 38,900

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Solution

The fourth proportional to 68,708, 94,817.05 and 38,900 is: 53,682.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,708 : 94,817.05 = 38,900 : x
  2. Step 2: Convert to fraction form
    68,708/94,817.05 = 38,900/x
  3. Step 3: Cross multiply
    68,708x = 94,817.05 × 38,900
  4. Step 4: Simplify right side
    68,708x = 3,688,383,245
  5. Step 5: Solve for x
    x = 3,688,383,245/68,708
  6. Step 6: Final answer
    x = 53,682.01

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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.