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Finding the Fourth Proportional to 259,107.72, 388,675.52 and 81,628.62

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Solution

The fourth proportional to 259,107.72, 388,675.52 and 81,628.62 is: 122,447.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,107.72 : 388,675.52 = 81,628.62 : x
  2. Step 2: Convert to fraction form
    259,107.72/388,675.52 = 81,628.62/x
  3. Step 3: Cross multiply
    259,107.72x = 388,675.52 × 81,628.62
  4. Step 4: Simplify right side
    259,107.72x = 31,727,045,917.24
  5. Step 5: Solve for x
    x = 31,727,045,917.24/259,107.72
  6. Step 6: Final answer
    x = 122,447.32

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1.5x scale

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.