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Finding the Third Proportional to 66,120 and 145,359

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Solution

The third proportional to 66,120 and 145,359 is: 319,558.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,120 : 145,359 = 145,359 : x
  2. Step 2: Convert to fraction form
    66,120/145,359 = 145,359/x
  3. Step 3: Cross multiply
    66,120x = 145,359 × 145,359
  4. Step 4: Simplify right side
    66,120x = 21,129,238,881
  5. Step 5: Solve for x
    x = 21,129,238,881/66,120
  6. Step 6: Final answer
    x = 319,558.97

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.