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Finding the Third Proportional to 69,480 and 149,678

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Solution

The third proportional to 69,480 and 149,678 is: 322,445.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,480 : 149,678 = 149,678 : x
  2. Step 2: Convert to fraction form
    69,480/149,678 = 149,678/x
  3. Step 3: Cross multiply
    69,480x = 149,678 × 149,678
  4. Step 4: Simplify right side
    69,480x = 22,403,503,684
  5. Step 5: Solve for x
    x = 22,403,503,684/69,480
  6. Step 6: Final answer
    x = 322,445.36

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.