Home / 257,979.36-387,029.04-80,476.80

Finding the Fourth Proportional to 257,979.36, 387,029.04 and 80,476.80

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Solution

The fourth proportional to 257,979.36, 387,029.04 and 80,476.80 is: 120,733.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,979.36 : 387,029.04 = 80,476.80 : x
  2. Step 2: Convert to fraction form
    257,979.36/387,029.04 = 80,476.80/x
  3. Step 3: Cross multiply
    257,979.36x = 387,029.04 × 80,476.80
  4. Step 4: Simplify right side
    257,979.36x = 31,146,858,646.27
  5. Step 5: Solve for x
    x = 31,146,858,646.27/257,979.36
  6. Step 6: Final answer
    x = 120,733.92

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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.