Home / 207,940.02-311,910.06-81,639.84

Finding the Fourth Proportional to 207,940.02, 311,910.06 and 81,639.84

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Solution

The fourth proportional to 207,940.02, 311,910.06 and 81,639.84 is: 122,459.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,940.02 : 311,910.06 = 81,639.84 : x
  2. Step 2: Convert to fraction form
    207,940.02/311,910.06 = 81,639.84/x
  3. Step 3: Cross multiply
    207,940.02x = 311,910.06 × 81,639.84
  4. Step 4: Simplify right side
    207,940.02x = 25,464,287,392.79
  5. Step 5: Solve for x
    x = 25,464,287,392.79/207,940.02
  6. Step 6: Final answer
    x = 122,459.77

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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.