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Finding the Third Proportional to 77,212.50 and 115,143.50

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Solution

The third proportional to 77,212.50 and 115,143.50 is: 171,708.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,212.50 : 115,143.50 = 115,143.50 : x
  2. Step 2: Convert to fraction form
    77,212.50/115,143.50 = 115,143.50/x
  3. Step 3: Cross multiply
    77,212.50x = 115,143.50 × 115,143.50
  4. Step 4: Simplify right side
    77,212.50x = 13,258,025,592.25
  5. Step 5: Solve for x
    x = 13,258,025,592.25/77,212.50
  6. Step 6: Final answer
    x = 171,708.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.