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Finding the Fourth Proportional to 203,710.20, 305,565.30 and 161,719.80

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Solution

The fourth proportional to 203,710.20, 305,565.30 and 161,719.80 is: 242,579.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,710.20 : 305,565.30 = 161,719.80 : x
  2. Step 2: Convert to fraction form
    203,710.20/305,565.30 = 161,719.80/x
  3. Step 3: Cross multiply
    203,710.20x = 305,565.30 × 161,719.80
  4. Step 4: Simplify right side
    203,710.20x = 49,415,959,202.94
  5. Step 5: Solve for x
    x = 49,415,959,202.94/203,710.20
  6. Step 6: Final answer
    x = 242,579.70

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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.