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Finding the Fourth Proportional to 262,080.70, 393,121.05 and 72,540.70

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Solution

The fourth proportional to 262,080.70, 393,121.05 and 72,540.70 is: 108,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,080.70 : 393,121.05 = 72,540.70 : x
  2. Step 2: Convert to fraction form
    262,080.70/393,121.05 = 72,540.70/x
  3. Step 3: Cross multiply
    262,080.70x = 393,121.05 × 72,540.70
  4. Step 4: Simplify right side
    262,080.70x = 28,517,276,151.74
  5. Step 5: Solve for x
    x = 28,517,276,151.74/262,080.70
  6. Step 6: Final answer
    x = 108,811.05

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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.