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Finding the Third Proportional to 138,421.50 and 207,633

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Solution

The third proportional to 138,421.50 and 207,633 is: 311,450.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,421.50 : 207,633 = 207,633 : x
  2. Step 2: Convert to fraction form
    138,421.50/207,633 = 207,633/x
  3. Step 3: Cross multiply
    138,421.50x = 207,633 × 207,633
  4. Step 4: Simplify right side
    138,421.50x = 43,111,462,689
  5. Step 5: Solve for x
    x = 43,111,462,689/138,421.50
  6. Step 6: Final answer
    x = 311,450.63

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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.