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Finding the Fourth Proportional to 120,855.78, 166,734.45 and 89,100.18

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Solution

The fourth proportional to 120,855.78, 166,734.45 and 89,100.18 is: 122,923.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,855.78 : 166,734.45 = 89,100.18 : x
  2. Step 2: Convert to fraction form
    120,855.78/166,734.45 = 89,100.18/x
  3. Step 3: Cross multiply
    120,855.78x = 166,734.45 × 89,100.18
  4. Step 4: Simplify right side
    120,855.78x = 14,856,069,507.20
  5. Step 5: Solve for x
    x = 14,856,069,507.20/120,855.78
  6. Step 6: Final answer
    x = 122,923.95

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1.5x scale

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.