Home / 207,905.20-311,639.10-81,496.60

Finding the Fourth Proportional to 207,905.20, 311,639.10 and 81,496.60

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Solution

The fourth proportional to 207,905.20, 311,639.10 and 81,496.60 is: 122,159.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,905.20 : 311,639.10 = 81,496.60 : x
  2. Step 2: Convert to fraction form
    207,905.20/311,639.10 = 81,496.60/x
  3. Step 3: Cross multiply
    207,905.20x = 311,639.10 × 81,496.60
  4. Step 4: Simplify right side
    207,905.20x = 25,397,527,077.06
  5. Step 5: Solve for x
    x = 25,397,527,077.06/207,905.20
  6. Step 6: Final answer
    x = 122,159.17

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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.