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Finding the Third Proportional to 30,621 and 47,313

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Solution

The third proportional to 30,621 and 47,313 is: 73,104.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,621 : 47,313 = 47,313 : x
  2. Step 2: Convert to fraction form
    30,621/47,313 = 47,313/x
  3. Step 3: Cross multiply
    30,621x = 47,313 × 47,313
  4. Step 4: Simplify right side
    30,621x = 2,238,519,969
  5. Step 5: Solve for x
    x = 2,238,519,969/30,621
  6. Step 6: Final answer
    x = 73,104.08

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.