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Finding the Third Proportional to 87,555.94 and 128,428.88

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Solution

The third proportional to 87,555.94 and 128,428.88 is: 188,382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,555.94 : 128,428.88 = 128,428.88 : x
  2. Step 2: Convert to fraction form
    87,555.94/128,428.88 = 128,428.88/x
  3. Step 3: Cross multiply
    87,555.94x = 128,428.88 × 128,428.88
  4. Step 4: Simplify right side
    87,555.94x = 16,493,975,933.77
  5. Step 5: Solve for x
    x = 16,493,975,933.77/87,555.94
  6. Step 6: Final answer
    x = 188,382.15

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.