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Finding the Fourth Proportional to 308,073.57, 425,136.81 and 172,109.49

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Solution

The fourth proportional to 308,073.57, 425,136.81 and 172,109.49 is: 237,508.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,073.57 : 425,136.81 = 172,109.49 : x
  2. Step 2: Convert to fraction form
    308,073.57/425,136.81 = 172,109.49/x
  3. Step 3: Cross multiply
    308,073.57x = 425,136.81 × 172,109.49
  4. Step 4: Simplify right side
    308,073.57x = 73,170,079,549.33
  5. Step 5: Solve for x
    x = 73,170,079,549.33/308,073.57
  6. Step 6: Final answer
    x = 237,508.46

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1.5x scale

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.