Home / 305,661.91-458,345.39-128,121.25

Finding the Fourth Proportional to 305,661.91, 458,345.39 and 128,121.25

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Solution

The fourth proportional to 305,661.91, 458,345.39 and 128,121.25 is: 192,120.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,661.91 : 458,345.39 = 128,121.25 : x
  2. Step 2: Convert to fraction form
    305,661.91/458,345.39 = 128,121.25/x
  3. Step 3: Cross multiply
    305,661.91x = 458,345.39 × 128,121.25
  4. Step 4: Simplify right side
    305,661.91x = 58,723,784,298.54
  5. Step 5: Solve for x
    x = 58,723,784,298.54/305,661.91
  6. Step 6: Final answer
    x = 192,120.06

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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.