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Finding the Fourth Proportional to 107,872.30, 161,808.45 and 103,321.90

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Solution

The fourth proportional to 107,872.30, 161,808.45 and 103,321.90 is: 154,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,872.30 : 161,808.45 = 103,321.90 : x
  2. Step 2: Convert to fraction form
    107,872.30/161,808.45 = 103,321.90/x
  3. Step 3: Cross multiply
    107,872.30x = 161,808.45 × 103,321.90
  4. Step 4: Simplify right side
    107,872.30x = 16,718,356,490.06
  5. Step 5: Solve for x
    x = 16,718,356,490.06/107,872.30
  6. Step 6: Final answer
    x = 154,982.85

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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.