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Finding the Third Proportional to 143,129 and 210,318

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Solution

The third proportional to 143,129 and 210,318 is: 309,047.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,129 : 210,318 = 210,318 : x
  2. Step 2: Convert to fraction form
    143,129/210,318 = 210,318/x
  3. Step 3: Cross multiply
    143,129x = 210,318 × 210,318
  4. Step 4: Simplify right side
    143,129x = 44,233,661,124
  5. Step 5: Solve for x
    x = 44,233,661,124/143,129
  6. Step 6: Final answer
    x = 309,047.51

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.