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Finding the Third Proportional to 80,485.13 and 128,116.88

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Solution

The third proportional to 80,485.13 and 128,116.88 is: 203,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,485.13 : 128,116.88 = 128,116.88 : x
  2. Step 2: Convert to fraction form
    80,485.13/128,116.88 = 128,116.88/x
  3. Step 3: Cross multiply
    80,485.13x = 128,116.88 × 128,116.88
  4. Step 4: Simplify right side
    80,485.13x = 16,413,933,659.77
  5. Step 5: Solve for x
    x = 16,413,933,659.77/80,485.13
  6. Step 6: Final answer
    x = 203,937.48

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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.