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Finding the Fourth Proportional to 308,080.95, 425,109.64 and 172,098.09

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Solution

The fourth proportional to 308,080.95, 425,109.64 and 172,098.09 is: 237,471.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,080.95 : 425,109.64 = 172,098.09 : x
  2. Step 2: Convert to fraction form
    308,080.95/425,109.64 = 172,098.09/x
  3. Step 3: Cross multiply
    308,080.95x = 425,109.64 × 172,098.09
  4. Step 4: Simplify right side
    308,080.95x = 73,160,557,084.59
  5. Step 5: Solve for x
    x = 73,160,557,084.59/308,080.95
  6. Step 6: Final answer
    x = 237,471.86

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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.