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Finding the Third Proportional to 72,039.75 and 105,723.75

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Solution

The third proportional to 72,039.75 and 105,723.75 is: 155,157.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,039.75 : 105,723.75 = 105,723.75 : x
  2. Step 2: Convert to fraction form
    72,039.75/105,723.75 = 105,723.75/x
  3. Step 3: Cross multiply
    72,039.75x = 105,723.75 × 105,723.75
  4. Step 4: Simplify right side
    72,039.75x = 11,177,511,314.06
  5. Step 5: Solve for x
    x = 11,177,511,314.06/72,039.75
  6. Step 6: Final answer
    x = 155,157.55

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.