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Finding the Fourth Proportional to 58,674.90, 87,989.31 and 20,716.07

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Solution

The fourth proportional to 58,674.90, 87,989.31 and 20,716.07 is: 31,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,674.90 : 87,989.31 = 20,716.07 : x
  2. Step 2: Convert to fraction form
    58,674.90/87,989.31 = 20,716.07/x
  3. Step 3: Cross multiply
    58,674.90x = 87,989.31 × 20,716.07
  4. Step 4: Simplify right side
    58,674.90x = 1,822,792,537.03
  5. Step 5: Solve for x
    x = 1,822,792,537.03/58,674.90
  6. Step 6: Final answer
    x = 31,065.97

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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.