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Finding the Third Proportional to 128,371.50 and 273,916.50

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Solution

The third proportional to 128,371.50 and 273,916.50 is: 584,477.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,371.50 : 273,916.50 = 273,916.50 : x
  2. Step 2: Convert to fraction form
    128,371.50/273,916.50 = 273,916.50/x
  3. Step 3: Cross multiply
    128,371.50x = 273,916.50 × 273,916.50
  4. Step 4: Simplify right side
    128,371.50x = 75,030,248,972.25
  5. Step 5: Solve for x
    x = 75,030,248,972.25/128,371.50
  6. Step 6: Final answer
    x = 584,477.47

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.