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Finding the Third Proportional to 120,178.69 and 186,823.97

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Solution

The third proportional to 120,178.69 and 186,823.97 is: 290,427.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,178.69 : 186,823.97 = 186,823.97 : x
  2. Step 2: Convert to fraction form
    120,178.69/186,823.97 = 186,823.97/x
  3. Step 3: Cross multiply
    120,178.69x = 186,823.97 × 186,823.97
  4. Step 4: Simplify right side
    120,178.69x = 34,903,195,299.50
  5. Step 5: Solve for x
    x = 34,903,195,299.50/120,178.69
  6. Step 6: Final answer
    x = 290,427.50

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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.