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Finding the Third Proportional to 61,620 and 133,080

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Solution

The third proportional to 61,620 and 133,080 is: 287,411.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,620 : 133,080 = 133,080 : x
  2. Step 2: Convert to fraction form
    61,620/133,080 = 133,080/x
  3. Step 3: Cross multiply
    61,620x = 133,080 × 133,080
  4. Step 4: Simplify right side
    61,620x = 17,710,286,400
  5. Step 5: Solve for x
    x = 17,710,286,400/61,620
  6. Step 6: Final answer
    x = 287,411.33

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.