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Finding the Fourth Proportional to 78,394.38, 108,182.43 and 42,583.59

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Solution

The fourth proportional to 78,394.38, 108,182.43 and 42,583.59 is: 58,764.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,394.38 : 108,182.43 = 42,583.59 : x
  2. Step 2: Convert to fraction form
    78,394.38/108,182.43 = 42,583.59/x
  3. Step 3: Cross multiply
    78,394.38x = 108,182.43 × 42,583.59
  4. Step 4: Simplify right side
    78,394.38x = 4,606,796,244.32
  5. Step 5: Solve for x
    x = 4,606,796,244.32/78,394.38
  6. Step 6: Final answer
    x = 58,764.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.