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Finding the Fourth Proportional to 58,647.88, 80,934.21 and 31,790.26

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Solution

The fourth proportional to 58,647.88, 80,934.21 and 31,790.26 is: 43,870.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,647.88 : 80,934.21 = 31,790.26 : x
  2. Step 2: Convert to fraction form
    58,647.88/80,934.21 = 31,790.26/x
  3. Step 3: Cross multiply
    58,647.88x = 80,934.21 × 31,790.26
  4. Step 4: Simplify right side
    58,647.88x = 2,572,919,578.79
  5. Step 5: Solve for x
    x = 2,572,919,578.79/58,647.88
  6. Step 6: Final answer
    x = 43,870.63

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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.