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Finding the Fourth Proportional to 55,166.70, 82,771.65 and 20,109.90

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Solution

The fourth proportional to 55,166.70, 82,771.65 and 20,109.90 is: 30,172.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,166.70 : 82,771.65 = 20,109.90 : x
  2. Step 2: Convert to fraction form
    55,166.70/82,771.65 = 20,109.90/x
  3. Step 3: Cross multiply
    55,166.70x = 82,771.65 × 20,109.90
  4. Step 4: Simplify right side
    55,166.70x = 1,664,529,604.34
  5. Step 5: Solve for x
    x = 1,664,529,604.34/55,166.70
  6. Step 6: Final answer
    x = 30,172.72

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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.