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Finding the Third Proportional to 31,163 and 66,697.50

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Solution

The third proportional to 31,163 and 66,697.50 is: 142,751.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,163 : 66,697.50 = 66,697.50 : x
  2. Step 2: Convert to fraction form
    31,163/66,697.50 = 66,697.50/x
  3. Step 3: Cross multiply
    31,163x = 66,697.50 × 66,697.50
  4. Step 4: Simplify right side
    31,163x = 4,448,556,506.25
  5. Step 5: Solve for x
    x = 4,448,556,506.25/31,163
  6. Step 6: Final answer
    x = 142,751.23

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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.