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Finding the Third Proportional to 78,025.50 and 102,015.75

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Solution

The third proportional to 78,025.50 and 102,015.75 is: 133,382.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,025.50 : 102,015.75 = 102,015.75 : x
  2. Step 2: Convert to fraction form
    78,025.50/102,015.75 = 102,015.75/x
  3. Step 3: Cross multiply
    78,025.50x = 102,015.75 × 102,015.75
  4. Step 4: Simplify right side
    78,025.50x = 10,407,213,248.06
  5. Step 5: Solve for x
    x = 10,407,213,248.06/78,025.50
  6. Step 6: Final answer
    x = 133,382.21

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.