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Finding the Third Proportional to 30,459 and 45,689

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Solution

The third proportional to 30,459 and 45,689 is: 68,534.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,459 : 45,689 = 45,689 : x
  2. Step 2: Convert to fraction form
    30,459/45,689 = 45,689/x
  3. Step 3: Cross multiply
    30,459x = 45,689 × 45,689
  4. Step 4: Simplify right side
    30,459x = 2,087,484,721
  5. Step 5: Solve for x
    x = 2,087,484,721/30,459
  6. Step 6: Final answer
    x = 68,534.25

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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.