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Finding the Fourth Proportional to 120,769.50, 166,667.12 and 67,054.51

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Solution

The fourth proportional to 120,769.50, 166,667.12 and 67,054.51 is: 92,538.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,769.50 : 166,667.12 = 67,054.51 : x
  2. Step 2: Convert to fraction form
    120,769.50/166,667.12 = 67,054.51/x
  3. Step 3: Cross multiply
    120,769.50x = 166,667.12 × 67,054.51
  4. Step 4: Simplify right side
    120,769.50x = 11,175,782,064.71
  5. Step 5: Solve for x
    x = 11,175,782,064.71/120,769.50
  6. Step 6: Final answer
    x = 92,538.12

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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.