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Finding the Fourth Proportional to 203,472.60, 305,208.90 and 103,939.80

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Solution

The fourth proportional to 203,472.60, 305,208.90 and 103,939.80 is: 155,909.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,472.60 : 305,208.90 = 103,939.80 : x
  2. Step 2: Convert to fraction form
    203,472.60/305,208.90 = 103,939.80/x
  3. Step 3: Cross multiply
    203,472.60x = 305,208.90 × 103,939.80
  4. Step 4: Simplify right side
    203,472.60x = 31,723,352,024.22
  5. Step 5: Solve for x
    x = 31,723,352,024.22/203,472.60
  6. Step 6: Final answer
    x = 155,909.70

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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.