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Finding the Third Proportional to 45,390 and 69,999

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Solution

The third proportional to 45,390 and 69,999 is: 107,950.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,390 : 69,999 = 69,999 : x
  2. Step 2: Convert to fraction form
    45,390/69,999 = 69,999/x
  3. Step 3: Cross multiply
    45,390x = 69,999 × 69,999
  4. Step 4: Simplify right side
    45,390x = 4,899,860,001
  5. Step 5: Solve for x
    x = 4,899,860,001/45,390
  6. Step 6: Final answer
    x = 107,950.21

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.