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Finding the Fourth Proportional to 203,558.40, 305,337.60 and 140,572.80

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Solution

The fourth proportional to 203,558.40, 305,337.60 and 140,572.80 is: 210,859.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,558.40 : 305,337.60 = 140,572.80 : x
  2. Step 2: Convert to fraction form
    203,558.40/305,337.60 = 140,572.80/x
  3. Step 3: Cross multiply
    203,558.40x = 305,337.60 × 140,572.80
  4. Step 4: Simplify right side
    203,558.40x = 42,922,161,377.28
  5. Step 5: Solve for x
    x = 42,922,161,377.28/203,558.40
  6. Step 6: Final answer
    x = 210,859.20

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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.