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Finding the Fourth Proportional to 120,322.61, 166,046.51 and 66,608.52

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Solution

The fourth proportional to 120,322.61, 166,046.51 and 66,608.52 is: 91,920.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,322.61 : 166,046.51 = 66,608.52 : x
  2. Step 2: Convert to fraction form
    120,322.61/166,046.51 = 66,608.52/x
  3. Step 3: Cross multiply
    120,322.61x = 166,046.51 × 66,608.52
  4. Step 4: Simplify right side
    120,322.61x = 11,060,112,261.45
  5. Step 5: Solve for x
    x = 11,060,112,261.45/120,322.61
  6. Step 6: Final answer
    x = 91,920.48

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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.