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Finding the Third Proportional to 60,486 and 90,789

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Solution

The third proportional to 60,486 and 90,789 is: 136,273.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,486 : 90,789 = 90,789 : x
  2. Step 2: Convert to fraction form
    60,486/90,789 = 90,789/x
  3. Step 3: Cross multiply
    60,486x = 90,789 × 90,789
  4. Step 4: Simplify right side
    60,486x = 8,242,642,521
  5. Step 5: Solve for x
    x = 8,242,642,521/60,486
  6. Step 6: Final answer
    x = 136,273.56

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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.