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Finding the Fourth Proportional to 68,857, 95,038.86 and 42,021.70

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Solution

The fourth proportional to 68,857, 95,038.86 and 42,021.70 is: 57,999.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,857 : 95,038.86 = 42,021.70 : x
  2. Step 2: Convert to fraction form
    68,857/95,038.86 = 42,021.70/x
  3. Step 3: Cross multiply
    68,857x = 95,038.86 × 42,021.70
  4. Step 4: Simplify right side
    68,857x = 3,993,694,463.26
  5. Step 5: Solve for x
    x = 3,993,694,463.26/68,857
  6. Step 6: Final answer
    x = 57,999.83

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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.