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Finding the Third Proportional to 51,215 and 77,538

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Solution

The third proportional to 51,215 and 77,538 is: 117,390.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,215 : 77,538 = 77,538 : x
  2. Step 2: Convert to fraction form
    51,215/77,538 = 77,538/x
  3. Step 3: Cross multiply
    51,215x = 77,538 × 77,538
  4. Step 4: Simplify right side
    51,215x = 6,012,141,444
  5. Step 5: Solve for x
    x = 6,012,141,444/51,215
  6. Step 6: Final answer
    x = 117,390.25

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.