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Finding the Fourth Proportional to 203,776.80, 305,665.20 and 70,612.80

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Solution

The fourth proportional to 203,776.80, 305,665.20 and 70,612.80 is: 105,919.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,776.80 : 305,665.20 = 70,612.80 : x
  2. Step 2: Convert to fraction form
    203,776.80/305,665.20 = 70,612.80/x
  3. Step 3: Cross multiply
    203,776.80x = 305,665.20 × 70,612.80
  4. Step 4: Simplify right side
    203,776.80x = 21,583,875,634.56
  5. Step 5: Solve for x
    x = 21,583,875,634.56/203,776.80
  6. Step 6: Final answer
    x = 105,919.20

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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.