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Finding the Third Proportional to 143,979 and 213,136

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Solution

The third proportional to 143,979 and 213,136 is: 315,510.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,979 : 213,136 = 213,136 : x
  2. Step 2: Convert to fraction form
    143,979/213,136 = 213,136/x
  3. Step 3: Cross multiply
    143,979x = 213,136 × 213,136
  4. Step 4: Simplify right side
    143,979x = 45,426,954,496
  5. Step 5: Solve for x
    x = 45,426,954,496/143,979
  6. Step 6: Final answer
    x = 315,510.97

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.