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Finding the Fourth Proportional to 69,057.40, 103,662.90 and 42,791.80

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Solution

The fourth proportional to 69,057.40, 103,662.90 and 42,791.80 is: 64,235.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,057.40 : 103,662.90 = 42,791.80 : x
  2. Step 2: Convert to fraction form
    69,057.40/103,662.90 = 42,791.80/x
  3. Step 3: Cross multiply
    69,057.40x = 103,662.90 × 42,791.80
  4. Step 4: Simplify right side
    69,057.40x = 4,435,922,084.22
  5. Step 5: Solve for x
    x = 4,435,922,084.22/69,057.40
  6. Step 6: Final answer
    x = 64,235.29

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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.