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Finding the Fourth Proportional to 259,704.99, 389,579.69 and 91,210.64

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Solution

The fourth proportional to 259,704.99, 389,579.69 and 91,210.64 is: 136,823.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,704.99 : 389,579.69 = 91,210.64 : x
  2. Step 2: Convert to fraction form
    259,704.99/389,579.69 = 91,210.64/x
  3. Step 3: Cross multiply
    259,704.99x = 389,579.69 × 91,210.64
  4. Step 4: Simplify right side
    259,704.99x = 35,533,810,451.95
  5. Step 5: Solve for x
    x = 35,533,810,451.95/259,704.99
  6. Step 6: Final answer
    x = 136,823.75

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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.