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Finding the Fourth Proportional to 69,815, 104,657.58 and 25,431.68

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Solution

The fourth proportional to 69,815, 104,657.58 and 25,431.68 is: 38,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,815 : 104,657.58 = 25,431.68 : x
  2. Step 2: Convert to fraction form
    69,815/104,657.58 = 25,431.68/x
  3. Step 3: Cross multiply
    69,815x = 104,657.58 × 25,431.68
  4. Step 4: Simplify right side
    69,815x = 2,661,618,084.13
  5. Step 5: Solve for x
    x = 2,661,618,084.13/69,815
  6. Step 6: Final answer
    x = 38,123.87

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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.