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Finding the Fourth Proportional to 69,427.80, 104,058.21 and 31,936.20

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Solution

The fourth proportional to 69,427.80, 104,058.21 and 31,936.20 is: 47,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,427.80 : 104,058.21 = 31,936.20 : x
  2. Step 2: Convert to fraction form
    69,427.80/104,058.21 = 31,936.20/x
  3. Step 3: Cross multiply
    69,427.80x = 104,058.21 × 31,936.20
  4. Step 4: Simplify right side
    69,427.80x = 3,323,223,806.20
  5. Step 5: Solve for x
    x = 3,323,223,806.20/69,427.80
  6. Step 6: Final answer
    x = 47,865.90

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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.