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Finding the Fourth Proportional to 41,991.89, 62,987.90 and 39,425.81

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Solution

The fourth proportional to 41,991.89, 62,987.90 and 39,425.81 is: 59,138.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,991.89 : 62,987.90 = 39,425.81 : x
  2. Step 2: Convert to fraction form
    41,991.89/62,987.90 = 39,425.81/x
  3. Step 3: Cross multiply
    41,991.89x = 62,987.90 × 39,425.81
  4. Step 4: Simplify right side
    41,991.89x = 2,483,348,465.63
  5. Step 5: Solve for x
    x = 2,483,348,465.63/41,991.89
  6. Step 6: Final answer
    x = 59,138.77

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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.