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Finding the Third Proportional to 77,145.50 and 115,718

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Solution

The third proportional to 77,145.50 and 115,718 is: 173,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,145.50 : 115,718 = 115,718 : x
  2. Step 2: Convert to fraction form
    77,145.50/115,718 = 115,718/x
  3. Step 3: Cross multiply
    77,145.50x = 115,718 × 115,718
  4. Step 4: Simplify right side
    77,145.50x = 13,390,655,524
  5. Step 5: Solve for x
    x = 13,390,655,524/77,145.50
  6. Step 6: Final answer
    x = 173,576.63

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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.