Home / 280,689.99-420,984.18-80,961.27

Finding the Fourth Proportional to 280,689.99, 420,984.18 and 80,961.27

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Solution

The fourth proportional to 280,689.99, 420,984.18 and 80,961.27 is: 121,427.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,689.99 : 420,984.18 = 80,961.27 : x
  2. Step 2: Convert to fraction form
    280,689.99/420,984.18 = 80,961.27/x
  3. Step 3: Cross multiply
    280,689.99x = 420,984.18 × 80,961.27
  4. Step 4: Simplify right side
    280,689.99x = 34,083,413,862.71
  5. Step 5: Solve for x
    x = 34,083,413,862.71/280,689.99
  6. Step 6: Final answer
    x = 121,427.25

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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.