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Finding the Fourth Proportional to 77,544.85, 115,791.99 and 61,570.64

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Solution

The fourth proportional to 77,544.85, 115,791.99 and 61,570.64 is: 91,938.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,544.85 : 115,791.99 = 61,570.64 : x
  2. Step 2: Convert to fraction form
    77,544.85/115,791.99 = 61,570.64/x
  3. Step 3: Cross multiply
    77,544.85x = 115,791.99 × 61,570.64
  4. Step 4: Simplify right side
    77,544.85x = 7,129,386,583.10
  5. Step 5: Solve for x
    x = 7,129,386,583.10/77,544.85
  6. Step 6: Final answer
    x = 91,938.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.