Home / 103,213.10-155,169.60-82,418.78

Finding the Fourth Proportional to 103,213.10, 155,169.60 and 82,418.78

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Solution

The fourth proportional to 103,213.10, 155,169.60 and 82,418.78 is: 123,907.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,213.10 : 155,169.60 = 82,418.78 : x
  2. Step 2: Convert to fraction form
    103,213.10/155,169.60 = 82,418.78/x
  3. Step 3: Cross multiply
    103,213.10x = 155,169.60 × 82,418.78
  4. Step 4: Simplify right side
    103,213.10x = 12,788,889,125.09
  5. Step 5: Solve for x
    x = 12,788,889,125.09/103,213.10
  6. Step 6: Final answer
    x = 123,907.62

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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.