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Finding the Third Proportional to 30,312 and 66,642

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Solution

The third proportional to 30,312 and 66,642 is: 146,514.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,312 : 66,642 = 66,642 : x
  2. Step 2: Convert to fraction form
    30,312/66,642 = 66,642/x
  3. Step 3: Cross multiply
    30,312x = 66,642 × 66,642
  4. Step 4: Simplify right side
    30,312x = 4,441,156,164
  5. Step 5: Solve for x
    x = 4,441,156,164/30,312
  6. Step 6: Final answer
    x = 146,514.79

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.