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Finding the Fourth Proportional to 69,240.80, 103,822.80 and 29,791.20

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Solution

The fourth proportional to 69,240.80, 103,822.80 and 29,791.20 is: 44,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,240.80 : 103,822.80 = 29,791.20 : x
  2. Step 2: Convert to fraction form
    69,240.80/103,822.80 = 29,791.20/x
  3. Step 3: Cross multiply
    69,240.80x = 103,822.80 × 29,791.20
  4. Step 4: Simplify right side
    69,240.80x = 3,093,005,799.36
  5. Step 5: Solve for x
    x = 3,093,005,799.36/69,240.80
  6. Step 6: Final answer
    x = 44,670.28

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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.