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Finding the Fourth Proportional to 308,118.96, 425,161.85 and 172,135.89

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Solution

The fourth proportional to 308,118.96, 425,161.85 and 172,135.89 is: 237,523.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,118.96 : 425,161.85 = 172,135.89 : x
  2. Step 2: Convert to fraction form
    308,118.96/425,161.85 = 172,135.89/x
  3. Step 3: Cross multiply
    308,118.96x = 425,161.85 × 172,135.89
  4. Step 4: Simplify right side
    308,118.96x = 73,185,612,583.12
  5. Step 5: Solve for x
    x = 73,185,612,583.12/308,118.96
  6. Step 6: Final answer
    x = 237,523.89

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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.