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Finding the Third Proportional to 64,395 and 138,312.56

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Solution

The third proportional to 64,395 and 138,312.56 is: 297,078.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,395 : 138,312.56 = 138,312.56 : x
  2. Step 2: Convert to fraction form
    64,395/138,312.56 = 138,312.56/x
  3. Step 3: Cross multiply
    64,395x = 138,312.56 × 138,312.56
  4. Step 4: Simplify right side
    64,395x = 19,130,364,945.32
  5. Step 5: Solve for x
    x = 19,130,364,945.32/64,395
  6. Step 6: Final answer
    x = 297,078.42

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.