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Finding the Third Proportional to 57,824 and 86,240

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Solution

The third proportional to 57,824 and 86,240 is: 128,620.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,824 : 86,240 = 86,240 : x
  2. Step 2: Convert to fraction form
    57,824/86,240 = 86,240/x
  3. Step 3: Cross multiply
    57,824x = 86,240 × 86,240
  4. Step 4: Simplify right side
    57,824x = 7,437,337,600
  5. Step 5: Solve for x
    x = 7,437,337,600/57,824
  6. Step 6: Final answer
    x = 128,620.25

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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.