Home / 280,243.91-420,436.27-80,564.66

Finding the Fourth Proportional to 280,243.91, 420,436.27 and 80,564.66

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Solution

The fourth proportional to 280,243.91, 420,436.27 and 80,564.66 is: 120,867.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,243.91 : 420,436.27 = 80,564.66 : x
  2. Step 2: Convert to fraction form
    280,243.91/420,436.27 = 80,564.66/x
  3. Step 3: Cross multiply
    280,243.91x = 420,436.27 × 80,564.66
  4. Step 4: Simplify right side
    280,243.91x = 33,872,303,142.74
  5. Step 5: Solve for x
    x = 33,872,303,142.74/280,243.91
  6. Step 6: Final answer
    x = 120,867.22

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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.