Home / 139,623.45-207,856-138,793.08

Finding the Fourth Proportional to 139,623.45, 207,856 and 138,793.08

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Solution

The fourth proportional to 139,623.45, 207,856 and 138,793.08 is: 206,619.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,623.45 : 207,856 = 138,793.08 : x
  2. Step 2: Convert to fraction form
    139,623.45/207,856 = 138,793.08/x
  3. Step 3: Cross multiply
    139,623.45x = 207,856 × 138,793.08
  4. Step 4: Simplify right side
    139,623.45x = 28,848,974,436.48
  5. Step 5: Solve for x
    x = 28,848,974,436.48/139,623.45
  6. Step 6: Final answer
    x = 206,619.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.