Home / 207,400.39-311,031.38-81,007.85

Finding the Fourth Proportional to 207,400.39, 311,031.38 and 81,007.85

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Solution

The fourth proportional to 207,400.39, 311,031.38 and 81,007.85 is: 121,484.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,400.39 : 311,031.38 = 81,007.85 : x
  2. Step 2: Convert to fraction form
    207,400.39/311,031.38 = 81,007.85/x
  3. Step 3: Cross multiply
    207,400.39x = 311,031.38 × 81,007.85
  4. Step 4: Simplify right side
    207,400.39x = 25,195,982,492.96
  5. Step 5: Solve for x
    x = 25,195,982,492.96/207,400.39
  6. Step 6: Final answer
    x = 121,484.74

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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.