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Finding the Fourth Proportional to 203,502.90, 305,181.45 and 103,629.90

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Solution

The fourth proportional to 203,502.90, 305,181.45 and 103,629.90 is: 155,407.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,502.90 : 305,181.45 = 103,629.90 : x
  2. Step 2: Convert to fraction form
    203,502.90/305,181.45 = 103,629.90/x
  3. Step 3: Cross multiply
    203,502.90x = 305,181.45 × 103,629.90
  4. Step 4: Simplify right side
    203,502.90x = 31,625,923,145.36
  5. Step 5: Solve for x
    x = 31,625,923,145.36/203,502.90
  6. Step 6: Final answer
    x = 155,407.73

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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.