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Finding the Third Proportional to 30,786.47 and 66,322.22

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Solution

The third proportional to 30,786.47 and 66,322.22 is: 142,875.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,786.47 : 66,322.22 = 66,322.22 : x
  2. Step 2: Convert to fraction form
    30,786.47/66,322.22 = 66,322.22/x
  3. Step 3: Cross multiply
    30,786.47x = 66,322.22 × 66,322.22
  4. Step 4: Simplify right side
    30,786.47x = 4,398,636,699.92
  5. Step 5: Solve for x
    x = 4,398,636,699.92/30,786.47
  6. Step 6: Final answer
    x = 142,875.65

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.