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Finding the Third Proportional to 74,289 and 156,778

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Solution

The third proportional to 74,289 and 156,778 is: 330,861.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,289 : 156,778 = 156,778 : x
  2. Step 2: Convert to fraction form
    74,289/156,778 = 156,778/x
  3. Step 3: Cross multiply
    74,289x = 156,778 × 156,778
  4. Step 4: Simplify right side
    74,289x = 24,579,341,284
  5. Step 5: Solve for x
    x = 24,579,341,284/74,289
  6. Step 6: Final answer
    x = 330,861.11

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.