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Finding the Third Proportional to 129,108.94 and 279,656.72

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Solution

The third proportional to 129,108.94 and 279,656.72 is: 605,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,108.94 : 279,656.72 = 279,656.72 : x
  2. Step 2: Convert to fraction form
    129,108.94/279,656.72 = 279,656.72/x
  3. Step 3: Cross multiply
    129,108.94x = 279,656.72 × 279,656.72
  4. Step 4: Simplify right side
    129,108.94x = 78,207,880,342.02
  5. Step 5: Solve for x
    x = 78,207,880,342.02/129,108.94
  6. Step 6: Final answer
    x = 605,751.10

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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.