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Finding the Third Proportional to 78,811.31 and 122,234.06

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Solution

The third proportional to 78,811.31 and 122,234.06 is: 189,581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.31 : 122,234.06 = 122,234.06 : x
  2. Step 2: Convert to fraction form
    78,811.31/122,234.06 = 122,234.06/x
  3. Step 3: Cross multiply
    78,811.31x = 122,234.06 × 122,234.06
  4. Step 4: Simplify right side
    78,811.31x = 14,941,166,035.25
  5. Step 5: Solve for x
    x = 14,941,166,035.25/78,811.31
  6. Step 6: Final answer
    x = 189,581.49

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.