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Finding the Fourth Proportional to 136,949.76, 188,991.92 and 80,362.08

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Solution

The fourth proportional to 136,949.76, 188,991.92 and 80,362.08 is: 110,900.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,949.76 : 188,991.92 = 80,362.08 : x
  2. Step 2: Convert to fraction form
    136,949.76/188,991.92 = 80,362.08/x
  3. Step 3: Cross multiply
    136,949.76x = 188,991.92 × 80,362.08
  4. Step 4: Simplify right side
    136,949.76x = 15,187,783,794.39
  5. Step 5: Solve for x
    x = 15,187,783,794.39/136,949.76
  6. Step 6: Final answer
    x = 110,900.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.