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Finding the Third Proportional to 129,138.75 and 273,618

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Solution

The third proportional to 129,138.75 and 273,618 is: 579,739.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,138.75 : 273,618 = 273,618 : x
  2. Step 2: Convert to fraction form
    129,138.75/273,618 = 273,618/x
  3. Step 3: Cross multiply
    129,138.75x = 273,618 × 273,618
  4. Step 4: Simplify right side
    129,138.75x = 74,866,809,924
  5. Step 5: Solve for x
    x = 74,866,809,924/129,138.75
  6. Step 6: Final answer
    x = 579,739.31

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.