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Finding the Third Proportional to 30,103.50 and 66,039

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Solution

The third proportional to 30,103.50 and 66,039 is: 144,871.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,103.50 : 66,039 = 66,039 : x
  2. Step 2: Convert to fraction form
    30,103.50/66,039 = 66,039/x
  3. Step 3: Cross multiply
    30,103.50x = 66,039 × 66,039
  4. Step 4: Simplify right side
    30,103.50x = 4,361,149,521
  5. Step 5: Solve for x
    x = 4,361,149,521/30,103.50
  6. Step 6: Final answer
    x = 144,871.84

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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.