Home / 259,716.20-389,477.10-91,171.40

Finding the Fourth Proportional to 259,716.20, 389,477.10 and 91,171.40

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Solution

The fourth proportional to 259,716.20, 389,477.10 and 91,171.40 is: 136,722.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,716.20 : 389,477.10 = 91,171.40 : x
  2. Step 2: Convert to fraction form
    259,716.20/389,477.10 = 91,171.40/x
  3. Step 3: Cross multiply
    259,716.20x = 389,477.10 × 91,171.40
  4. Step 4: Simplify right side
    259,716.20x = 35,509,172,474.94
  5. Step 5: Solve for x
    x = 35,509,172,474.94/259,716.20
  6. Step 6: Final answer
    x = 136,722.98

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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.