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Finding the Fourth Proportional to 266,991.82, 400,436.69 and 80,003.32

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Solution

The fourth proportional to 266,991.82, 400,436.69 and 80,003.32 is: 119,989.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,991.82 : 400,436.69 = 80,003.32 : x
  2. Step 2: Convert to fraction form
    266,991.82/400,436.69 = 80,003.32/x
  3. Step 3: Cross multiply
    266,991.82x = 400,436.69 × 80,003.32
  4. Step 4: Simplify right side
    266,991.82x = 32,036,263,248.70
  5. Step 5: Solve for x
    x = 32,036,263,248.70/266,991.82
  6. Step 6: Final answer
    x = 119,989.68

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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.