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Finding the Fourth Proportional to 203,911.40, 305,867.10 and 140,925.80

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Solution

The fourth proportional to 203,911.40, 305,867.10 and 140,925.80 is: 211,388.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,911.40 : 305,867.10 = 140,925.80 : x
  2. Step 2: Convert to fraction form
    203,911.40/305,867.10 = 140,925.80/x
  3. Step 3: Cross multiply
    203,911.40x = 305,867.10 × 140,925.80
  4. Step 4: Simplify right side
    203,911.40x = 43,104,565,761.18
  5. Step 5: Solve for x
    x = 43,104,565,761.18/203,911.40
  6. Step 6: Final answer
    x = 211,388.70

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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.