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Finding the Third Proportional to 128,766.75 and 189,296.25

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Solution

The third proportional to 128,766.75 and 189,296.25 is: 278,278.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,766.75 : 189,296.25 = 189,296.25 : x
  2. Step 2: Convert to fraction form
    128,766.75/189,296.25 = 189,296.25/x
  3. Step 3: Cross multiply
    128,766.75x = 189,296.25 × 189,296.25
  4. Step 4: Simplify right side
    128,766.75x = 35,833,070,264.06
  5. Step 5: Solve for x
    x = 35,833,070,264.06/128,766.75
  6. Step 6: Final answer
    x = 278,278.91

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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.