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Finding the Third Proportional to 109,642.50 and 239,787

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Solution

The third proportional to 109,642.50 and 239,787 is: 524,411.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,642.50 : 239,787 = 239,787 : x
  2. Step 2: Convert to fraction form
    109,642.50/239,787 = 239,787/x
  3. Step 3: Cross multiply
    109,642.50x = 239,787 × 239,787
  4. Step 4: Simplify right side
    109,642.50x = 57,497,805,369
  5. Step 5: Solve for x
    x = 57,497,805,369/109,642.50
  6. Step 6: Final answer
    x = 524,411.66

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.