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Finding the Fourth Proportional to 203,474.90, 305,139.45 and 103,601.90

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Solution

The fourth proportional to 203,474.90, 305,139.45 and 103,601.90 is: 155,365.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,474.90 : 305,139.45 = 103,601.90 : x
  2. Step 2: Convert to fraction form
    203,474.90/305,139.45 = 103,601.90/x
  3. Step 3: Cross multiply
    203,474.90x = 305,139.45 × 103,601.90
  4. Step 4: Simplify right side
    203,474.90x = 31,613,026,784.96
  5. Step 5: Solve for x
    x = 31,613,026,784.96/203,474.90
  6. Step 6: Final answer
    x = 155,365.73

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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.