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Finding the Third Proportional to 72,028 and 156,971

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Solution

The third proportional to 72,028 and 156,971 is: 342,087.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,028 : 156,971 = 156,971 : x
  2. Step 2: Convert to fraction form
    72,028/156,971 = 156,971/x
  3. Step 3: Cross multiply
    72,028x = 156,971 × 156,971
  4. Step 4: Simplify right side
    72,028x = 24,639,894,841
  5. Step 5: Solve for x
    x = 24,639,894,841/72,028
  6. Step 6: Final answer
    x = 342,087.73

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.