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Finding the Fourth Proportional to 198,940.80, 298,411.20 and 67,612.80

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Solution

The fourth proportional to 198,940.80, 298,411.20 and 67,612.80 is: 101,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,940.80 : 298,411.20 = 67,612.80 : x
  2. Step 2: Convert to fraction form
    198,940.80/298,411.20 = 67,612.80/x
  3. Step 3: Cross multiply
    198,940.80x = 298,411.20 × 67,612.80
  4. Step 4: Simplify right side
    198,940.80x = 20,176,416,783.36
  5. Step 5: Solve for x
    x = 20,176,416,783.36/198,940.80
  6. Step 6: Final answer
    x = 101,419.20

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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.