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Finding the Fourth Proportional to 266,990.16, 400,355.64 and 100,791.12

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Solution

The fourth proportional to 266,990.16, 400,355.64 and 100,791.12 is: 151,137.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,990.16 : 400,355.64 = 100,791.12 : x
  2. Step 2: Convert to fraction form
    266,990.16/400,355.64 = 100,791.12/x
  3. Step 3: Cross multiply
    266,990.16x = 400,355.64 × 100,791.12
  4. Step 4: Simplify right side
    266,990.16x = 40,352,293,353.92
  5. Step 5: Solve for x
    x = 40,352,293,353.92/266,990.16
  6. Step 6: Final answer
    x = 151,137.75

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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.