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Finding the Third Proportional to 47,319 and 72,455

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Solution

The third proportional to 47,319 and 72,455 is: 110,943.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,319 : 72,455 = 72,455 : x
  2. Step 2: Convert to fraction form
    47,319/72,455 = 72,455/x
  3. Step 3: Cross multiply
    47,319x = 72,455 × 72,455
  4. Step 4: Simplify right side
    47,319x = 5,249,727,025
  5. Step 5: Solve for x
    x = 5,249,727,025/47,319
  6. Step 6: Final answer
    x = 110,943.32

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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.