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Finding the Fourth Proportional to 61,199.20, 91,791.68 and 19,082.40

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Solution

The fourth proportional to 61,199.20, 91,791.68 and 19,082.40 is: 28,621.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,199.20 : 91,791.68 = 19,082.40 : x
  2. Step 2: Convert to fraction form
    61,199.20/91,791.68 = 19,082.40/x
  3. Step 3: Cross multiply
    61,199.20x = 91,791.68 × 19,082.40
  4. Step 4: Simplify right side
    61,199.20x = 1,751,605,554.43
  5. Step 5: Solve for x
    x = 1,751,605,554.43/61,199.20
  6. Step 6: Final answer
    x = 28,621.38

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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.