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Finding the Fourth Proportional to 120,969.65, 166,928.66 and 67,251.40

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Solution

The fourth proportional to 120,969.65, 166,928.66 and 67,251.40 is: 92,801.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,969.65 : 166,928.66 = 67,251.40 : x
  2. Step 2: Convert to fraction form
    120,969.65/166,928.66 = 67,251.40/x
  3. Step 3: Cross multiply
    120,969.65x = 166,928.66 × 67,251.40
  4. Step 4: Simplify right side
    120,969.65x = 11,226,184,914.22
  5. Step 5: Solve for x
    x = 11,226,184,914.22/120,969.65
  6. Step 6: Final answer
    x = 92,801.66

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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.