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Finding the Fourth Proportional to 103,628.15, 155,183.03 and 82,892.15

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Solution

The fourth proportional to 103,628.15, 155,183.03 and 82,892.15 is: 124,130.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,628.15 : 155,183.03 = 82,892.15 : x
  2. Step 2: Convert to fraction form
    103,628.15/155,183.03 = 82,892.15/x
  3. Step 3: Cross multiply
    103,628.15x = 155,183.03 × 82,892.15
  4. Step 4: Simplify right side
    103,628.15x = 12,863,454,585.75
  5. Step 5: Solve for x
    x = 12,863,454,585.75/103,628.15
  6. Step 6: Final answer
    x = 124,130.89

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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.