Home / 259,059.15-388,643.40-81,584.10

Finding the Fourth Proportional to 259,059.15, 388,643.40 and 81,584.10

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Solution

The fourth proportional to 259,059.15, 388,643.40 and 81,584.10 is: 122,393.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,059.15 : 388,643.40 = 81,584.10 : x
  2. Step 2: Convert to fraction form
    259,059.15/388,643.40 = 81,584.10/x
  3. Step 3: Cross multiply
    259,059.15x = 388,643.40 × 81,584.10
  4. Step 4: Simplify right side
    259,059.15x = 31,707,122,009.94
  5. Step 5: Solve for x
    x = 31,707,122,009.94/259,059.15
  6. Step 6: Final answer
    x = 122,393.37

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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.