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Finding the Fourth Proportional to 198,503.95, 297,588.47 and 86,099.49

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Solution

The fourth proportional to 198,503.95, 297,588.47 and 86,099.49 is: 129,076.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,503.95 : 297,588.47 = 86,099.49 : x
  2. Step 2: Convert to fraction form
    198,503.95/297,588.47 = 86,099.49/x
  3. Step 3: Cross multiply
    198,503.95x = 297,588.47 × 86,099.49
  4. Step 4: Simplify right side
    198,503.95x = 25,622,215,066.38
  5. Step 5: Solve for x
    x = 25,622,215,066.38/198,503.95
  6. Step 6: Final answer
    x = 129,076.60

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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.