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Finding the Third Proportional to 30,831.75 and 66,573

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Solution

The third proportional to 30,831.75 and 66,573 is: 143,746.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,831.75 : 66,573 = 66,573 : x
  2. Step 2: Convert to fraction form
    30,831.75/66,573 = 66,573/x
  3. Step 3: Cross multiply
    30,831.75x = 66,573 × 66,573
  4. Step 4: Simplify right side
    30,831.75x = 4,431,964,329
  5. Step 5: Solve for x
    x = 4,431,964,329/30,831.75
  6. Step 6: Final answer
    x = 143,746.77

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.