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Finding the Fourth Proportional to 69,397.65, 104,080.90 and 31,921.73

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Solution

The fourth proportional to 69,397.65, 104,080.90 and 31,921.73 is: 47,875.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,397.65 : 104,080.90 = 31,921.73 : x
  2. Step 2: Convert to fraction form
    69,397.65/104,080.90 = 31,921.73/x
  3. Step 3: Cross multiply
    69,397.65x = 104,080.90 × 31,921.73
  4. Step 4: Simplify right side
    69,397.65x = 3,322,441,707.94
  5. Step 5: Solve for x
    x = 3,322,441,707.94/69,397.65
  6. Step 6: Final answer
    x = 47,875.42

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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.