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Finding the Third Proportional to 31,176 and 66,730

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Solution

The third proportional to 31,176 and 66,730 is: 142,830.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,176 : 66,730 = 66,730 : x
  2. Step 2: Convert to fraction form
    31,176/66,730 = 66,730/x
  3. Step 3: Cross multiply
    31,176x = 66,730 × 66,730
  4. Step 4: Simplify right side
    31,176x = 4,452,892,900
  5. Step 5: Solve for x
    x = 4,452,892,900/31,176
  6. Step 6: Final answer
    x = 142,830.80

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.