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Finding the Fourth Proportional to 69,090.72, 103,620.60 and 26,971.80

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Solution

The fourth proportional to 69,090.72, 103,620.60 and 26,971.80 is: 40,451.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,090.72 : 103,620.60 = 26,971.80 : x
  2. Step 2: Convert to fraction form
    69,090.72/103,620.60 = 26,971.80/x
  3. Step 3: Cross multiply
    69,090.72x = 103,620.60 × 26,971.80
  4. Step 4: Simplify right side
    69,090.72x = 2,794,834,099.08
  5. Step 5: Solve for x
    x = 2,794,834,099.08/69,090.72
  6. Step 6: Final answer
    x = 40,451.66

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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.