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Finding the Fourth Proportional to 120,373.62, 166,121.55 and 66,664.50

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Solution

The fourth proportional to 120,373.62, 166,121.55 and 66,664.50 is: 92,000.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,373.62 : 166,121.55 = 66,664.50 : x
  2. Step 2: Convert to fraction form
    120,373.62/166,121.55 = 66,664.50/x
  3. Step 3: Cross multiply
    120,373.62x = 166,121.55 × 66,664.50
  4. Step 4: Simplify right side
    120,373.62x = 11,074,410,069.98
  5. Step 5: Solve for x
    x = 11,074,410,069.98/120,373.62
  6. Step 6: Final answer
    x = 92,000.31

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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.