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Finding the Third Proportional to 80,484.50 and 128,115

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Solution

The third proportional to 80,484.50 and 128,115 is: 203,933.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,484.50 : 128,115 = 128,115 : x
  2. Step 2: Convert to fraction form
    80,484.50/128,115 = 128,115/x
  3. Step 3: Cross multiply
    80,484.50x = 128,115 × 128,115
  4. Step 4: Simplify right side
    80,484.50x = 16,413,453,225
  5. Step 5: Solve for x
    x = 16,413,453,225/80,484.50
  6. Step 6: Final answer
    x = 203,933.10

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.