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Finding the Third Proportional to 64,518 and 138,923.50

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Solution

The third proportional to 64,518 and 138,923.50 is: 299,137.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,518 : 138,923.50 = 138,923.50 : x
  2. Step 2: Convert to fraction form
    64,518/138,923.50 = 138,923.50/x
  3. Step 3: Cross multiply
    64,518x = 138,923.50 × 138,923.50
  4. Step 4: Simplify right side
    64,518x = 19,299,738,852.25
  5. Step 5: Solve for x
    x = 19,299,738,852.25/64,518
  6. Step 6: Final answer
    x = 299,137.28

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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.