Home / 223,979.24-309,078.78-128,477

Finding the Fourth Proportional to 223,979.24, 309,078.78 and 128,477

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Solution

The fourth proportional to 223,979.24, 309,078.78 and 128,477 is: 177,291.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,979.24 : 309,078.78 = 128,477 : x
  2. Step 2: Convert to fraction form
    223,979.24/309,078.78 = 128,477/x
  3. Step 3: Cross multiply
    223,979.24x = 309,078.78 × 128,477
  4. Step 4: Simplify right side
    223,979.24x = 39,709,514,418.06
  5. Step 5: Solve for x
    x = 39,709,514,418.06/223,979.24
  6. Step 6: Final answer
    x = 177,291.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.