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Finding the Fourth Proportional to 104,036.78, 143,570.70 and 58,724.28

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Solution

The fourth proportional to 104,036.78, 143,570.70 and 58,724.28 is: 81,039.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,036.78 : 143,570.70 = 58,724.28 : x
  2. Step 2: Convert to fraction form
    104,036.78/143,570.70 = 58,724.28/x
  3. Step 3: Cross multiply
    104,036.78x = 143,570.70 × 58,724.28
  4. Step 4: Simplify right side
    104,036.78x = 8,431,085,986.60
  5. Step 5: Solve for x
    x = 8,431,085,986.60/104,036.78
  6. Step 6: Final answer
    x = 81,039.47

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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.