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Finding the Fourth Proportional to 45,588.80, 68,350.80 and 20,640.80

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Solution

The fourth proportional to 45,588.80, 68,350.80 and 20,640.80 is: 30,946.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,588.80 : 68,350.80 = 20,640.80 : x
  2. Step 2: Convert to fraction form
    45,588.80/68,350.80 = 20,640.80/x
  3. Step 3: Cross multiply
    45,588.80x = 68,350.80 × 20,640.80
  4. Step 4: Simplify right side
    45,588.80x = 1,410,815,192.64
  5. Step 5: Solve for x
    x = 1,410,815,192.64/45,588.80
  6. Step 6: Final answer
    x = 30,946.53

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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.