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Finding the Fourth Proportional to 117,207.94, 161,707.17 and 66,213.22

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Solution

The fourth proportional to 117,207.94, 161,707.17 and 66,213.22 is: 91,351.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,207.94 : 161,707.17 = 66,213.22 : x
  2. Step 2: Convert to fraction form
    117,207.94/161,707.17 = 66,213.22/x
  3. Step 3: Cross multiply
    117,207.94x = 161,707.17 × 66,213.22
  4. Step 4: Simplify right side
    117,207.94x = 10,707,152,422.79
  5. Step 5: Solve for x
    x = 10,707,152,422.79/117,207.94
  6. Step 6: Final answer
    x = 91,351.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.