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Finding the Third Proportional to 138,156.75 and 213,340.50

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Solution

The third proportional to 138,156.75 and 213,340.50 is: 329,438.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,156.75 : 213,340.50 = 213,340.50 : x
  2. Step 2: Convert to fraction form
    138,156.75/213,340.50 = 213,340.50/x
  3. Step 3: Cross multiply
    138,156.75x = 213,340.50 × 213,340.50
  4. Step 4: Simplify right side
    138,156.75x = 45,514,168,940.25
  5. Step 5: Solve for x
    x = 45,514,168,940.25/138,156.75
  6. Step 6: Final answer
    x = 329,438.62

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.