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Finding the Third Proportional to 120,788 and 177,629.50

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Solution

The third proportional to 120,788 and 177,629.50 is: 261,219.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,788 : 177,629.50 = 177,629.50 : x
  2. Step 2: Convert to fraction form
    120,788/177,629.50 = 177,629.50/x
  3. Step 3: Cross multiply
    120,788x = 177,629.50 × 177,629.50
  4. Step 4: Simplify right side
    120,788x = 31,552,239,270.25
  5. Step 5: Solve for x
    x = 31,552,239,270.25/120,788
  6. Step 6: Final answer
    x = 261,219.98

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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.