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Finding the Fourth Proportional to 57,859.19, 86,648.64 and 40,039.92

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Solution

The fourth proportional to 57,859.19, 86,648.64 and 40,039.92 is: 59,962.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,859.19 : 86,648.64 = 40,039.92 : x
  2. Step 2: Convert to fraction form
    57,859.19/86,648.64 = 40,039.92/x
  3. Step 3: Cross multiply
    57,859.19x = 86,648.64 × 40,039.92
  4. Step 4: Simplify right side
    57,859.19x = 3,469,404,463.56
  5. Step 5: Solve for x
    x = 3,469,404,463.56/57,859.19
  6. Step 6: Final answer
    x = 59,962.89

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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.