Home / 121,143,847.20-181,715,770.80-72,770,906.40

Finding the Fourth Proportional to 121,143,847.20, 181,715,770.80 and 72,770,906.40

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Solution

The fourth proportional to 121,143,847.20, 181,715,770.80 and 72,770,906.40 is: 109,156,359.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,143,847.20 : 181,715,770.80 = 72,770,906.40 : x
  2. Step 2: Convert to fraction form
    121,143,847.20/181,715,770.80 = 72,770,906.40/x
  3. Step 3: Cross multiply
    121,143,847.20x = 181,715,770.80 × 72,770,906.40
  4. Step 4: Simplify right side
    121,143,847.20x = 13,223,621,348,290,656
  5. Step 5: Solve for x
    x = 13,223,621,348,290,656/121,143,847.20
  6. Step 6: Final answer
    x = 109,156,359.60

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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.