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Finding the Fourth Proportional to 120,480.78, 166,267.77 and 72,724.80

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Solution

The fourth proportional to 120,480.78, 166,267.77 and 72,724.80 is: 100,362.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,480.78 : 166,267.77 = 72,724.80 : x
  2. Step 2: Convert to fraction form
    120,480.78/166,267.77 = 72,724.80/x
  3. Step 3: Cross multiply
    120,480.78x = 166,267.77 × 72,724.80
  4. Step 4: Simplify right side
    120,480.78x = 12,091,790,319.70
  5. Step 5: Solve for x
    x = 12,091,790,319.70/120,480.78
  6. Step 6: Final answer
    x = 100,362.82

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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.