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Finding the Fourth Proportional to 120,371.57, 166,110.71 and 66,655.43

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Solution

The fourth proportional to 120,371.57, 166,110.71 and 66,655.43 is: 91,983.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,371.57 : 166,110.71 = 66,655.43 : x
  2. Step 2: Convert to fraction form
    120,371.57/166,110.71 = 66,655.43/x
  3. Step 3: Cross multiply
    120,371.57x = 166,110.71 × 66,655.43
  4. Step 4: Simplify right side
    120,371.57x = 11,072,179,972.10
  5. Step 5: Solve for x
    x = 11,072,179,972.10/120,371.57
  6. Step 6: Final answer
    x = 91,983.35

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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.