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Finding the Third Proportional to 138,148.50 and 202,689

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Solution

The third proportional to 138,148.50 and 202,689 is: 297,381.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,148.50 : 202,689 = 202,689 : x
  2. Step 2: Convert to fraction form
    138,148.50/202,689 = 202,689/x
  3. Step 3: Cross multiply
    138,148.50x = 202,689 × 202,689
  4. Step 4: Simplify right side
    138,148.50x = 41,082,830,721
  5. Step 5: Solve for x
    x = 41,082,830,721/138,148.50
  6. Step 6: Final answer
    x = 297,381.66

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.