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Finding the Fourth Proportional to 200,553.72, 300,807.09 and 80,605.95

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Solution

The fourth proportional to 200,553.72, 300,807.09 and 80,605.95 is: 120,899.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,553.72 : 300,807.09 = 80,605.95 : x
  2. Step 2: Convert to fraction form
    200,553.72/300,807.09 = 80,605.95/x
  3. Step 3: Cross multiply
    200,553.72x = 300,807.09 × 80,605.95
  4. Step 4: Simplify right side
    200,553.72x = 24,246,841,256.19
  5. Step 5: Solve for x
    x = 24,246,841,256.19/200,553.72
  6. Step 6: Final answer
    x = 120,899.48

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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.