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Finding the Third Proportional to 30,215 and 65,290

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Solution

The third proportional to 30,215 and 65,290 is: 141,081.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,215 : 65,290 = 65,290 : x
  2. Step 2: Convert to fraction form
    30,215/65,290 = 65,290/x
  3. Step 3: Cross multiply
    30,215x = 65,290 × 65,290
  4. Step 4: Simplify right side
    30,215x = 4,262,784,100
  5. Step 5: Solve for x
    x = 4,262,784,100/30,215
  6. Step 6: Final answer
    x = 141,081.72

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.