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Finding the Third Proportional to 129,130 and 279,706

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Solution

The third proportional to 129,130 and 279,706 is: 605,865.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,130 : 279,706 = 279,706 : x
  2. Step 2: Convert to fraction form
    129,130/279,706 = 279,706/x
  3. Step 3: Cross multiply
    129,130x = 279,706 × 279,706
  4. Step 4: Simplify right side
    129,130x = 78,235,446,436
  5. Step 5: Solve for x
    x = 78,235,446,436/129,130
  6. Step 6: Final answer
    x = 605,865.77

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.