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Finding the Fourth Proportional to 69,221.80, 103,881.30 and 29,807.20

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Solution

The fourth proportional to 69,221.80, 103,881.30 and 29,807.20 is: 44,731.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,221.80 : 103,881.30 = 29,807.20 : x
  2. Step 2: Convert to fraction form
    69,221.80/103,881.30 = 29,807.20/x
  3. Step 3: Cross multiply
    69,221.80x = 103,881.30 × 29,807.20
  4. Step 4: Simplify right side
    69,221.80x = 3,096,410,685.36
  5. Step 5: Solve for x
    x = 3,096,410,685.36/69,221.80
  6. Step 6: Final answer
    x = 44,731.73

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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.