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Finding the Fourth Proportional to 58,490.93, 87,744.21 and 20,531.18

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Solution

The fourth proportional to 58,490.93, 87,744.21 and 20,531.18 is: 30,799.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,490.93 : 87,744.21 = 20,531.18 : x
  2. Step 2: Convert to fraction form
    58,490.93/87,744.21 = 20,531.18/x
  3. Step 3: Cross multiply
    58,490.93x = 87,744.21 × 20,531.18
  4. Step 4: Simplify right side
    58,490.93x = 1,801,492,169.47
  5. Step 5: Solve for x
    x = 1,801,492,169.47/58,490.93
  6. Step 6: Final answer
    x = 30,799.51

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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.