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Finding the Fourth Proportional to 45,791.60, 68,622.60 and 40,218.80

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Solution

The fourth proportional to 45,791.60, 68,622.60 and 40,218.80 is: 60,271.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,791.60 : 68,622.60 = 40,218.80 : x
  2. Step 2: Convert to fraction form
    45,791.60/68,622.60 = 40,218.80/x
  3. Step 3: Cross multiply
    45,791.60x = 68,622.60 × 40,218.80
  4. Step 4: Simplify right side
    45,791.60x = 2,759,918,624.88
  5. Step 5: Solve for x
    x = 2,759,918,624.88/45,791.60
  6. Step 6: Final answer
    x = 60,271.29

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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.