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Finding the Fourth Proportional to 120,871.86, 166,801.95 and 67,155.72

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Solution

The fourth proportional to 120,871.86, 166,801.95 and 67,155.72 is: 92,674.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,871.86 : 166,801.95 = 67,155.72 : x
  2. Step 2: Convert to fraction form
    120,871.86/166,801.95 = 67,155.72/x
  3. Step 3: Cross multiply
    120,871.86x = 166,801.95 × 67,155.72
  4. Step 4: Simplify right side
    120,871.86x = 11,201,705,049.65
  5. Step 5: Solve for x
    x = 11,201,705,049.65/120,871.86
  6. Step 6: Final answer
    x = 92,674.22

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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.