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Finding the Third Proportional to 129,222 and 189,576

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Solution

The third proportional to 129,222 and 189,576 is: 278,118.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,222 : 189,576 = 189,576 : x
  2. Step 2: Convert to fraction form
    129,222/189,576 = 189,576/x
  3. Step 3: Cross multiply
    129,222x = 189,576 × 189,576
  4. Step 4: Simplify right side
    129,222x = 35,939,059,776
  5. Step 5: Solve for x
    x = 35,939,059,776/129,222
  6. Step 6: Final answer
    x = 278,118.74

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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.