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Finding the Third Proportional to 64,720 and 141,416

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Solution

The third proportional to 64,720 and 141,416 is: 309,000.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,720 : 141,416 = 141,416 : x
  2. Step 2: Convert to fraction form
    64,720/141,416 = 141,416/x
  3. Step 3: Cross multiply
    64,720x = 141,416 × 141,416
  4. Step 4: Simplify right side
    64,720x = 19,998,485,056
  5. Step 5: Solve for x
    x = 19,998,485,056/64,720
  6. Step 6: Final answer
    x = 309,000.08

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.