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Finding the Fourth Proportional to 57,706.70, 86,572.20 and 18,267.80

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Solution

The fourth proportional to 57,706.70, 86,572.20 and 18,267.80 is: 27,405.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,706.70 : 86,572.20 = 18,267.80 : x
  2. Step 2: Convert to fraction form
    57,706.70/86,572.20 = 18,267.80/x
  3. Step 3: Cross multiply
    57,706.70x = 86,572.20 × 18,267.80
  4. Step 4: Simplify right side
    57,706.70x = 1,581,483,635.16
  5. Step 5: Solve for x
    x = 1,581,483,635.16/57,706.70
  6. Step 6: Final answer
    x = 27,405.55

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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.