Home / 259,935.66-389,940.68-80,036.30

Finding the Fourth Proportional to 259,935.66, 389,940.68 and 80,036.30

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Solution

The fourth proportional to 259,935.66, 389,940.68 and 80,036.30 is: 120,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,935.66 : 389,940.68 = 80,036.30 : x
  2. Step 2: Convert to fraction form
    259,935.66/389,940.68 = 80,036.30/x
  3. Step 3: Cross multiply
    259,935.66x = 389,940.68 × 80,036.30
  4. Step 4: Simplify right side
    259,935.66x = 31,209,409,246.68
  5. Step 5: Solve for x
    x = 31,209,409,246.68/259,935.66
  6. Step 6: Final answer
    x = 120,065.90

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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.