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Finding the Fourth Proportional to 103,910.92, 143,302.92 and 68,087.92

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Solution

The fourth proportional to 103,910.92, 143,302.92 and 68,087.92 is: 93,899.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,910.92 : 143,302.92 = 68,087.92 : x
  2. Step 2: Convert to fraction form
    103,910.92/143,302.92 = 68,087.92/x
  3. Step 3: Cross multiply
    103,910.92x = 143,302.92 × 68,087.92
  4. Step 4: Simplify right side
    103,910.92x = 9,757,197,752.73
  5. Step 5: Solve for x
    x = 9,757,197,752.73/103,910.92
  6. Step 6: Final answer
    x = 93,899.64

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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.