Home / 259,348.08-389,022.08-81,979.60

Finding the Fourth Proportional to 259,348.08, 389,022.08 and 81,979.60

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Solution

The fourth proportional to 259,348.08, 389,022.08 and 81,979.60 is: 122,969.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,348.08 : 389,022.08 = 81,979.60 : x
  2. Step 2: Convert to fraction form
    259,348.08/389,022.08 = 81,979.60/x
  3. Step 3: Cross multiply
    259,348.08x = 389,022.08 × 81,979.60
  4. Step 4: Simplify right side
    259,348.08x = 31,891,874,509.57
  5. Step 5: Solve for x
    x = 31,891,874,509.57/259,348.08
  6. Step 6: Final answer
    x = 122,969.39

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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.