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Finding the Third Proportional to 66,781.50 and 155,289

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Solution

The third proportional to 66,781.50 and 155,289 is: 361,098.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,781.50 : 155,289 = 155,289 : x
  2. Step 2: Convert to fraction form
    66,781.50/155,289 = 155,289/x
  3. Step 3: Cross multiply
    66,781.50x = 155,289 × 155,289
  4. Step 4: Simplify right side
    66,781.50x = 24,114,673,521
  5. Step 5: Solve for x
    x = 24,114,673,521/66,781.50
  6. Step 6: Final answer
    x = 361,098.11

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Why These Related Problems?

These problems maintain the same ratio (2.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.