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Finding the Third Proportional to 128,181.55 and 279,427.85

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Solution

The third proportional to 128,181.55 and 279,427.85 is: 609,135.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,181.55 : 279,427.85 = 279,427.85 : x
  2. Step 2: Convert to fraction form
    128,181.55/279,427.85 = 279,427.85/x
  3. Step 3: Cross multiply
    128,181.55x = 279,427.85 × 279,427.85
  4. Step 4: Simplify right side
    128,181.55x = 78,079,924,228.83
  5. Step 5: Solve for x
    x = 78,079,924,228.83/128,181.55
  6. Step 6: Final answer
    x = 609,135.43

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.