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Finding the Fourth Proportional to 57,717.70, 86,584.65 and 18,270.70

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Solution

The fourth proportional to 57,717.70, 86,584.65 and 18,270.70 is: 27,408.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,717.70 : 86,584.65 = 18,270.70 : x
  2. Step 2: Convert to fraction form
    57,717.70/86,584.65 = 18,270.70/x
  3. Step 3: Cross multiply
    57,717.70x = 86,584.65 × 18,270.70
  4. Step 4: Simplify right side
    57,717.70x = 1,581,962,164.76
  5. Step 5: Solve for x
    x = 1,581,962,164.76/57,717.70
  6. Step 6: Final answer
    x = 27,408.61

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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.