Home / 138,183.41-206,942.95-78,839.16

Finding the Fourth Proportional to 138,183.41, 206,942.95 and 78,839.16

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Solution

The fourth proportional to 138,183.41, 206,942.95 and 78,839.16 is: 118,069.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,183.41 : 206,942.95 = 78,839.16 : x
  2. Step 2: Convert to fraction form
    138,183.41/206,942.95 = 78,839.16/x
  3. Step 3: Cross multiply
    138,183.41x = 206,942.95 × 78,839.16
  4. Step 4: Simplify right side
    138,183.41x = 16,315,208,345.92
  5. Step 5: Solve for x
    x = 16,315,208,345.92/138,183.41
  6. Step 6: Final answer
    x = 118,069.23

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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.