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Finding the Third Proportional to 53,239 and 82,779

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Solution

The third proportional to 53,239 and 82,779 is: 128,709.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,239 : 82,779 = 82,779 : x
  2. Step 2: Convert to fraction form
    53,239/82,779 = 82,779/x
  3. Step 3: Cross multiply
    53,239x = 82,779 × 82,779
  4. Step 4: Simplify right side
    53,239x = 6,852,362,841
  5. Step 5: Solve for x
    x = 6,852,362,841/53,239
  6. Step 6: Final answer
    x = 128,709.46

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.