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Finding the Fourth Proportional to 207,321.70, 311,031.54 and 67,080.32

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Solution

The fourth proportional to 207,321.70, 311,031.54 and 67,080.32 is: 100,636.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,321.70 : 311,031.54 = 67,080.32 : x
  2. Step 2: Convert to fraction form
    207,321.70/311,031.54 = 67,080.32/x
  3. Step 3: Cross multiply
    207,321.70x = 311,031.54 × 67,080.32
  4. Step 4: Simplify right side
    207,321.70x = 20,864,095,233.29
  5. Step 5: Solve for x
    x = 20,864,095,233.29/207,321.70
  6. Step 6: Final answer
    x = 100,636.33

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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.