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Finding the Third Proportional to 47,130 and 72,879

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Solution

The third proportional to 47,130 and 72,879 is: 112,695.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,130 : 72,879 = 72,879 : x
  2. Step 2: Convert to fraction form
    47,130/72,879 = 72,879/x
  3. Step 3: Cross multiply
    47,130x = 72,879 × 72,879
  4. Step 4: Simplify right side
    47,130x = 5,311,348,641
  5. Step 5: Solve for x
    x = 5,311,348,641/47,130
  6. Step 6: Final answer
    x = 112,695.71

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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.