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Finding the Third Proportional to 54,312 and 81,132

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Solution

The third proportional to 54,312 and 81,132 is: 121,196.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,312 : 81,132 = 81,132 : x
  2. Step 2: Convert to fraction form
    54,312/81,132 = 81,132/x
  3. Step 3: Cross multiply
    54,312x = 81,132 × 81,132
  4. Step 4: Simplify right side
    54,312x = 6,582,401,424
  5. Step 5: Solve for x
    x = 6,582,401,424/54,312
  6. Step 6: Final answer
    x = 121,196.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.