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Finding the Third Proportional to 53,185 and 85,687

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Solution

The third proportional to 53,185 and 85,687 is: 138,051.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,185 : 85,687 = 85,687 : x
  2. Step 2: Convert to fraction form
    53,185/85,687 = 85,687/x
  3. Step 3: Cross multiply
    53,185x = 85,687 × 85,687
  4. Step 4: Simplify right side
    53,185x = 7,342,261,969
  5. Step 5: Solve for x
    x = 7,342,261,969/53,185
  6. Step 6: Final answer
    x = 138,051.37

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.