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Finding the Fourth Proportional to 120,069.80, 180,104.69 and 45,206.74

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Solution

The fourth proportional to 120,069.80, 180,104.69 and 45,206.74 is: 67,810.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,069.80 : 180,104.69 = 45,206.74 : x
  2. Step 2: Convert to fraction form
    120,069.80/180,104.69 = 45,206.74/x
  3. Step 3: Cross multiply
    120,069.80x = 180,104.69 × 45,206.74
  4. Step 4: Simplify right side
    120,069.80x = 8,141,944,767.05
  5. Step 5: Solve for x
    x = 8,141,944,767.05/120,069.80
  6. Step 6: Final answer
    x = 67,810.10

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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.