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Finding the Fourth Proportional to 308,147.17, 425,262.81 and 172,181.47

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Solution

The fourth proportional to 308,147.17, 425,262.81 and 172,181.47 is: 237,621.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,147.17 : 425,262.81 = 172,181.47 : x
  2. Step 2: Convert to fraction form
    308,147.17/425,262.81 = 172,181.47/x
  3. Step 3: Cross multiply
    308,147.17x = 425,262.81 × 172,181.47
  4. Step 4: Simplify right side
    308,147.17x = 73,222,375,762.13
  5. Step 5: Solve for x
    x = 73,222,375,762.13/308,147.17
  6. Step 6: Final answer
    x = 237,621.44

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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.