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Finding the Fourth Proportional to 108,400.97, 149,575.50 and 68,086.02

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Solution

The fourth proportional to 108,400.97, 149,575.50 and 68,086.02 is: 93,947.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,400.97 : 149,575.50 = 68,086.02 : x
  2. Step 2: Convert to fraction form
    108,400.97/149,575.50 = 68,086.02/x
  3. Step 3: Cross multiply
    108,400.97x = 149,575.50 × 68,086.02
  4. Step 4: Simplify right side
    108,400.97x = 10,183,999,855.25
  5. Step 5: Solve for x
    x = 10,183,999,855.25/108,400.97
  6. Step 6: Final answer
    x = 93,947.50

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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.