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Finding the Third Proportional to 30,730 and 66,132

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Solution

The third proportional to 30,730 and 66,132 is: 142,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,730 : 66,132 = 66,132 : x
  2. Step 2: Convert to fraction form
    30,730/66,132 = 66,132/x
  3. Step 3: Cross multiply
    30,730x = 66,132 × 66,132
  4. Step 4: Simplify right side
    30,730x = 4,373,441,424
  5. Step 5: Solve for x
    x = 4,373,441,424/30,730
  6. Step 6: Final answer
    x = 142,318.30

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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.