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Finding the Fourth Proportional to 120,318.42, 166,037.42 and 66,602.30

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Solution

The fourth proportional to 120,318.42, 166,037.42 and 66,602.30 is: 91,910.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,318.42 : 166,037.42 = 66,602.30 : x
  2. Step 2: Convert to fraction form
    120,318.42/166,037.42 = 66,602.30/x
  3. Step 3: Cross multiply
    120,318.42x = 166,037.42 × 66,602.30
  4. Step 4: Simplify right side
    120,318.42x = 11,058,472,894.87
  5. Step 5: Solve for x
    x = 11,058,472,894.87/120,318.42
  6. Step 6: Final answer
    x = 91,910.06

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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.