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Finding the Third Proportional to 139,871.81 and 215,115.75

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Solution

The third proportional to 139,871.81 and 215,115.75 is: 330,837.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,871.81 : 215,115.75 = 215,115.75 : x
  2. Step 2: Convert to fraction form
    139,871.81/215,115.75 = 215,115.75/x
  3. Step 3: Cross multiply
    139,871.81x = 215,115.75 × 215,115.75
  4. Step 4: Simplify right side
    139,871.81x = 46,274,785,898.06
  5. Step 5: Solve for x
    x = 46,274,785,898.06/139,871.81
  6. Step 6: Final answer
    x = 330,837.11

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.