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Finding the Fourth Proportional to 120,770.81, 166,660.54 and 67,054.45

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Solution

The fourth proportional to 120,770.81, 166,660.54 and 67,054.45 is: 92,533.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,770.81 : 166,660.54 = 67,054.45 : x
  2. Step 2: Convert to fraction form
    120,770.81/166,660.54 = 67,054.45/x
  3. Step 3: Cross multiply
    120,770.81x = 166,660.54 × 67,054.45
  4. Step 4: Simplify right side
    120,770.81x = 11,175,330,013.10
  5. Step 5: Solve for x
    x = 11,175,330,013.10/120,770.81
  6. Step 6: Final answer
    x = 92,533.37

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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.