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Finding the Fourth Proportional to 203,129.73, 304,507.99 and 69,978.33

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Solution

The fourth proportional to 203,129.73, 304,507.99 and 69,978.33 is: 104,903.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,129.73 : 304,507.99 = 69,978.33 : x
  2. Step 2: Convert to fraction form
    203,129.73/304,507.99 = 69,978.33/x
  3. Step 3: Cross multiply
    203,129.73x = 304,507.99 × 69,978.33
  4. Step 4: Simplify right side
    203,129.73x = 21,308,960,611.86
  5. Step 5: Solve for x
    x = 21,308,960,611.86/203,129.73
  6. Step 6: Final answer
    x = 104,903.21

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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.