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Finding the Fourth Proportional to 69,238.80, 103,860.48 and 21,854.36

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Solution

The fourth proportional to 69,238.80, 103,860.48 and 21,854.36 is: 32,782.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,238.80 : 103,860.48 = 21,854.36 : x
  2. Step 2: Convert to fraction form
    69,238.80/103,860.48 = 21,854.36/x
  3. Step 3: Cross multiply
    69,238.80x = 103,860.48 × 21,854.36
  4. Step 4: Simplify right side
    69,238.80x = 2,269,804,319.69
  5. Step 5: Solve for x
    x = 2,269,804,319.69/69,238.80
  6. Step 6: Final answer
    x = 32,782.26

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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.