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Finding the Third Proportional to 53,393 and 81,440

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Solution

The third proportional to 53,393 and 81,440 is: 124,219.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,393 : 81,440 = 81,440 : x
  2. Step 2: Convert to fraction form
    53,393/81,440 = 81,440/x
  3. Step 3: Cross multiply
    53,393x = 81,440 × 81,440
  4. Step 4: Simplify right side
    53,393x = 6,632,473,600
  5. Step 5: Solve for x
    x = 6,632,473,600/53,393
  6. Step 6: Final answer
    x = 124,219.91

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.