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Finding the Third Proportional to 128,620.50 and 183,472

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Solution

The third proportional to 128,620.50 and 183,472 is: 261,715.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,620.50 : 183,472 = 183,472 : x
  2. Step 2: Convert to fraction form
    128,620.50/183,472 = 183,472/x
  3. Step 3: Cross multiply
    128,620.50x = 183,472 × 183,472
  4. Step 4: Simplify right side
    128,620.50x = 33,661,974,784
  5. Step 5: Solve for x
    x = 33,661,974,784/128,620.50
  6. Step 6: Final answer
    x = 261,715.47

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.