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Finding the Third Proportional to 56,918 and 85,560

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Solution

The third proportional to 56,918 and 85,560 is: 128,615.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,918 : 85,560 = 85,560 : x
  2. Step 2: Convert to fraction form
    56,918/85,560 = 85,560/x
  3. Step 3: Cross multiply
    56,918x = 85,560 × 85,560
  4. Step 4: Simplify right side
    56,918x = 7,320,513,600
  5. Step 5: Solve for x
    x = 7,320,513,600/56,918
  6. Step 6: Final answer
    x = 128,615.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.