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Finding the Third Proportional to 31,230 and 47,628

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Solution

The third proportional to 31,230 and 47,628 is: 72,636.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,230 : 47,628 = 47,628 : x
  2. Step 2: Convert to fraction form
    31,230/47,628 = 47,628/x
  3. Step 3: Cross multiply
    31,230x = 47,628 × 47,628
  4. Step 4: Simplify right side
    31,230x = 2,268,426,384
  5. Step 5: Solve for x
    x = 2,268,426,384/31,230
  6. Step 6: Final answer
    x = 72,636.13

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.