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Finding the Third Proportional to 30,699 and 66,657

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Solution

The third proportional to 30,699 and 66,657 is: 144,732.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,699 : 66,657 = 66,657 : x
  2. Step 2: Convert to fraction form
    30,699/66,657 = 66,657/x
  3. Step 3: Cross multiply
    30,699x = 66,657 × 66,657
  4. Step 4: Simplify right side
    30,699x = 4,443,155,649
  5. Step 5: Solve for x
    x = 4,443,155,649/30,699
  6. Step 6: Final answer
    x = 144,732.91

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.