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Finding the Third Proportional to 128,445 and 195,696

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Solution

The third proportional to 128,445 and 195,696 is: 298,158.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,445 : 195,696 = 195,696 : x
  2. Step 2: Convert to fraction form
    128,445/195,696 = 195,696/x
  3. Step 3: Cross multiply
    128,445x = 195,696 × 195,696
  4. Step 4: Simplify right side
    128,445x = 38,296,924,416
  5. Step 5: Solve for x
    x = 38,296,924,416/128,445
  6. Step 6: Final answer
    x = 298,158.16

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.