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Finding the Fourth Proportional to 308,072.57, 425,135.43 and 172,108.49

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Solution

The fourth proportional to 308,072.57, 425,135.43 and 172,108.49 is: 237,507.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,072.57 : 425,135.43 = 172,108.49 : x
  2. Step 2: Convert to fraction form
    308,072.57/425,135.43 = 172,108.49/x
  3. Step 3: Cross multiply
    308,072.57x = 425,135.43 × 172,108.49
  4. Step 4: Simplify right side
    308,072.57x = 73,169,414,777.12
  5. Step 5: Solve for x
    x = 73,169,414,777.12/308,072.57
  6. Step 6: Final answer
    x = 237,507.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.