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Finding the Fourth Proportional to 203,859.40, 305,789.10 and 124,025.80

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Solution

The fourth proportional to 203,859.40, 305,789.10 and 124,025.80 is: 186,038.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,859.40 : 305,789.10 = 124,025.80 : x
  2. Step 2: Convert to fraction form
    203,859.40/305,789.10 = 124,025.80/x
  3. Step 3: Cross multiply
    203,859.40x = 305,789.10 × 124,025.80
  4. Step 4: Simplify right side
    203,859.40x = 37,925,737,758.78
  5. Step 5: Solve for x
    x = 37,925,737,758.78/203,859.40
  6. Step 6: Final answer
    x = 186,038.70

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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.