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Finding the Third Proportional to 75,345.75 and 102,330

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Solution

The third proportional to 75,345.75 and 102,330 is: 138,978.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,345.75 : 102,330 = 102,330 : x
  2. Step 2: Convert to fraction form
    75,345.75/102,330 = 102,330/x
  3. Step 3: Cross multiply
    75,345.75x = 102,330 × 102,330
  4. Step 4: Simplify right side
    75,345.75x = 10,471,428,900
  5. Step 5: Solve for x
    x = 10,471,428,900/75,345.75
  6. Step 6: Final answer
    x = 138,978.36

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.