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Finding the Third Proportional to 72,420 and 115,236

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Solution

The third proportional to 72,420 and 115,236 is: 183,365.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,420 : 115,236 = 115,236 : x
  2. Step 2: Convert to fraction form
    72,420/115,236 = 115,236/x
  3. Step 3: Cross multiply
    72,420x = 115,236 × 115,236
  4. Step 4: Simplify right side
    72,420x = 13,279,335,696
  5. Step 5: Solve for x
    x = 13,279,335,696/72,420
  6. Step 6: Final answer
    x = 183,365.59

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.