Home / 221,218,581.66-305,196,497.91-138,568,479.90

Finding the Fourth Proportional to 221,218,581.66, 305,196,497.91 and 138,568,479.90

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Solution

The fourth proportional to 221,218,581.66, 305,196,497.91 and 138,568,479.90 is: 191,171,168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,218,581.66 : 305,196,497.91 = 138,568,479.90 : x
  2. Step 2: Convert to fraction form
    221,218,581.66/305,196,497.91 = 138,568,479.90/x
  3. Step 3: Cross multiply
    221,218,581.66x = 305,196,497.91 × 138,568,479.90
  4. Step 4: Simplify right side
    221,218,581.66x = 42,290,614,786,192,232
  5. Step 5: Solve for x
    x = 42,290,614,786,192,232/221,218,581.66
  6. Step 6: Final answer
    x = 191,171,168.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.