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Finding the Fourth Proportional to 199,538.60, 299,362.56 and 99,578.12

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Solution

The fourth proportional to 199,538.60, 299,362.56 and 99,578.12 is: 149,394.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,538.60 : 299,362.56 = 99,578.12 : x
  2. Step 2: Convert to fraction form
    199,538.60/299,362.56 = 99,578.12/x
  3. Step 3: Cross multiply
    199,538.60x = 299,362.56 × 99,578.12
  4. Step 4: Simplify right side
    199,538.60x = 29,809,960,923.19
  5. Step 5: Solve for x
    x = 29,809,960,923.19/199,538.60
  6. Step 6: Final answer
    x = 149,394.46

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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.