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Finding the Fourth Proportional to 203,479.94, 305,121.42 and 70,313.48

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Solution

The fourth proportional to 203,479.94, 305,121.42 and 70,313.48 is: 105,436.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,479.94 : 305,121.42 = 70,313.48 : x
  2. Step 2: Convert to fraction form
    203,479.94/305,121.42 = 70,313.48/x
  3. Step 3: Cross multiply
    203,479.94x = 305,121.42 × 70,313.48
  4. Step 4: Simplify right side
    203,479.94x = 21,454,148,862.74
  5. Step 5: Solve for x
    x = 21,454,148,862.74/203,479.94
  6. Step 6: Final answer
    x = 105,436.19

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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.