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Finding the Third Proportional to 121,728 and 187,024

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Solution

The third proportional to 121,728 and 187,024 is: 287,345.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,728 : 187,024 = 187,024 : x
  2. Step 2: Convert to fraction form
    121,728/187,024 = 187,024/x
  3. Step 3: Cross multiply
    121,728x = 187,024 × 187,024
  4. Step 4: Simplify right side
    121,728x = 34,977,976,576
  5. Step 5: Solve for x
    x = 34,977,976,576/121,728
  6. Step 6: Final answer
    x = 287,345.36

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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.