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Finding the Fourth Proportional to 80,646,541.80, 120,969,812.70 and 80,646,541.80

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Solution

The fourth proportional to 80,646,541.80, 120,969,812.70 and 80,646,541.80 is: 120,969,812.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,646,541.80 : 120,969,812.70 = 80,646,541.80 : x
  2. Step 2: Convert to fraction form
    80,646,541.80/120,969,812.70 = 80,646,541.80/x
  3. Step 3: Cross multiply
    80,646,541.80x = 120,969,812.70 × 80,646,541.80
  4. Step 4: Simplify right side
    80,646,541.80x = 9,755,797,056,448,720
  5. Step 5: Solve for x
    x = 9,755,797,056,448,720/80,646,541.80
  6. Step 6: Final answer
    x = 120,969,812.70

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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.