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Finding the Third Proportional to 55,557 and 121,666

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Solution

The third proportional to 55,557 and 121,666 is: 266,440.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,557 : 121,666 = 121,666 : x
  2. Step 2: Convert to fraction form
    55,557/121,666 = 121,666/x
  3. Step 3: Cross multiply
    55,557x = 121,666 × 121,666
  4. Step 4: Simplify right side
    55,557x = 14,802,615,556
  5. Step 5: Solve for x
    x = 14,802,615,556/55,557
  6. Step 6: Final answer
    x = 266,440.15

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.