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Finding the Fourth Proportional to 72,757.66, 109,136.10 and 20,166.96

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Solution

The fourth proportional to 72,757.66, 109,136.10 and 20,166.96 is: 30,250.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,757.66 : 109,136.10 = 20,166.96 : x
  2. Step 2: Convert to fraction form
    72,757.66/109,136.10 = 20,166.96/x
  3. Step 3: Cross multiply
    72,757.66x = 109,136.10 × 20,166.96
  4. Step 4: Simplify right side
    72,757.66x = 2,200,943,363.26
  5. Step 5: Solve for x
    x = 2,200,943,363.26/72,757.66
  6. Step 6: Final answer
    x = 30,250.33

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1.5x scale

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.