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Finding the Third Proportional to 138,133.50 and 207,712.88

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Solution

The third proportional to 138,133.50 and 207,712.88 is: 312,340.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,133.50 : 207,712.88 = 207,712.88 : x
  2. Step 2: Convert to fraction form
    138,133.50/207,712.88 = 207,712.88/x
  3. Step 3: Cross multiply
    138,133.50x = 207,712.88 × 207,712.88
  4. Step 4: Simplify right side
    138,133.50x = 43,144,638,440.77
  5. Step 5: Solve for x
    x = 43,144,638,440.77/138,133.50
  6. Step 6: Final answer
    x = 312,340.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.