Home / 103,713.10-155,180.85-68,721.10

Finding the Fourth Proportional to 103,713.10, 155,180.85 and 68,721.10

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Solution

The fourth proportional to 103,713.10, 155,180.85 and 68,721.10 is: 102,824.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,713.10 : 155,180.85 = 68,721.10 : x
  2. Step 2: Convert to fraction form
    103,713.10/155,180.85 = 68,721.10/x
  3. Step 3: Cross multiply
    103,713.10x = 155,180.85 × 68,721.10
  4. Step 4: Simplify right side
    103,713.10x = 10,664,198,710.94
  5. Step 5: Solve for x
    x = 10,664,198,710.94/103,713.10
  6. Step 6: Final answer
    x = 102,824.03

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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.