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Finding the Fourth Proportional to 199,331.40, 298,989.90 and 80,999.40

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Solution

The fourth proportional to 199,331.40, 298,989.90 and 80,999.40 is: 121,496.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,331.40 : 298,989.90 = 80,999.40 : x
  2. Step 2: Convert to fraction form
    199,331.40/298,989.90 = 80,999.40/x
  3. Step 3: Cross multiply
    199,331.40x = 298,989.90 × 80,999.40
  4. Step 4: Simplify right side
    199,331.40x = 24,218,002,506.06
  5. Step 5: Solve for x
    x = 24,218,002,506.06/199,331.40
  6. Step 6: Final answer
    x = 121,496.17

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1.5x scale

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.