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Finding the Fourth Proportional to 198,636.60, 297,954.90 and 127,777.80

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Solution

The fourth proportional to 198,636.60, 297,954.90 and 127,777.80 is: 191,666.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,636.60 : 297,954.90 = 127,777.80 : x
  2. Step 2: Convert to fraction form
    198,636.60/297,954.90 = 127,777.80/x
  3. Step 3: Cross multiply
    198,636.60x = 297,954.90 × 127,777.80
  4. Step 4: Simplify right side
    198,636.60x = 38,072,021,621.22
  5. Step 5: Solve for x
    x = 38,072,021,621.22/198,636.60
  6. Step 6: Final answer
    x = 191,666.70

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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.