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Finding the Third Proportional to 30,447 and 66,078

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Solution

The third proportional to 30,447 and 66,078 is: 143,406.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,447 : 66,078 = 66,078 : x
  2. Step 2: Convert to fraction form
    30,447/66,078 = 66,078/x
  3. Step 3: Cross multiply
    30,447x = 66,078 × 66,078
  4. Step 4: Simplify right side
    30,447x = 4,366,302,084
  5. Step 5: Solve for x
    x = 4,366,302,084/30,447
  6. Step 6: Final answer
    x = 143,406.64

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.