Home / 207,431.32-311,131.90-81,047.88

Finding the Fourth Proportional to 207,431.32, 311,131.90 and 81,047.88

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Solution

The fourth proportional to 207,431.32, 311,131.90 and 81,047.88 is: 121,565.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,431.32 : 311,131.90 = 81,047.88 : x
  2. Step 2: Convert to fraction form
    207,431.32/311,131.90 = 81,047.88/x
  3. Step 3: Cross multiply
    207,431.32x = 311,131.90 × 81,047.88
  4. Step 4: Simplify right side
    207,431.32x = 25,216,580,895.37
  5. Step 5: Solve for x
    x = 25,216,580,895.37/207,431.32
  6. Step 6: Final answer
    x = 121,565.93

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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.