Home / 207,632.10-311,431.95-81,247.80

Finding the Fourth Proportional to 207,632.10, 311,431.95 and 81,247.80

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Solution

The fourth proportional to 207,632.10, 311,431.95 and 81,247.80 is: 121,865.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,632.10 : 311,431.95 = 81,247.80 : x
  2. Step 2: Convert to fraction form
    207,632.10/311,431.95 = 81,247.80/x
  3. Step 3: Cross multiply
    207,632.10x = 311,431.95 × 81,247.80
  4. Step 4: Simplify right side
    207,632.10x = 25,303,160,787.21
  5. Step 5: Solve for x
    x = 25,303,160,787.21/207,632.10
  6. Step 6: Final answer
    x = 121,865.36

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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.