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Finding the Fourth Proportional to 120,069.62, 180,104.43 and 45,206.56

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Solution

The fourth proportional to 120,069.62, 180,104.43 and 45,206.56 is: 67,809.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,069.62 : 180,104.43 = 45,206.56 : x
  2. Step 2: Convert to fraction form
    120,069.62/180,104.43 = 45,206.56/x
  3. Step 3: Cross multiply
    120,069.62x = 180,104.43 × 45,206.56
  4. Step 4: Simplify right side
    120,069.62x = 8,141,901,721.06
  5. Step 5: Solve for x
    x = 8,141,901,721.06/120,069.62
  6. Step 6: Final answer
    x = 67,809.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.