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Finding the Fourth Proportional to 120,628.95, 166,443.03 and 69,640.80

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Solution

The fourth proportional to 120,628.95, 166,443.03 and 69,640.80 is: 96,089.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,628.95 : 166,443.03 = 69,640.80 : x
  2. Step 2: Convert to fraction form
    120,628.95/166,443.03 = 69,640.80/x
  3. Step 3: Cross multiply
    120,628.95x = 166,443.03 × 69,640.80
  4. Step 4: Simplify right side
    120,628.95x = 11,591,225,763.62
  5. Step 5: Solve for x
    x = 11,591,225,763.62/120,628.95
  6. Step 6: Final answer
    x = 96,089.92

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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.