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Finding the Third Proportional to 60,390 and 90,441

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Solution

The third proportional to 60,390 and 90,441 is: 135,445.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,390 : 90,441 = 90,441 : x
  2. Step 2: Convert to fraction form
    60,390/90,441 = 90,441/x
  3. Step 3: Cross multiply
    60,390x = 90,441 × 90,441
  4. Step 4: Simplify right side
    60,390x = 8,179,574,481
  5. Step 5: Solve for x
    x = 8,179,574,481/60,390
  6. Step 6: Final answer
    x = 135,445.84

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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.