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Finding the Third Proportional to 128,516.25 and 192,018.38

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Solution

The third proportional to 128,516.25 and 192,018.38 is: 286,898.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,516.25 : 192,018.38 = 192,018.38 : x
  2. Step 2: Convert to fraction form
    128,516.25/192,018.38 = 192,018.38/x
  3. Step 3: Cross multiply
    128,516.25x = 192,018.38 × 192,018.38
  4. Step 4: Simplify right side
    128,516.25x = 36,871,056,337.64
  5. Step 5: Solve for x
    x = 36,871,056,337.64/128,516.25
  6. Step 6: Final answer
    x = 286,898.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.