Home / 280,345.20-420,582.20-80,667.24

Finding the Fourth Proportional to 280,345.20, 420,582.20 and 80,667.24

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Solution

The fourth proportional to 280,345.20, 420,582.20 and 80,667.24 is: 121,019.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,345.20 : 420,582.20 = 80,667.24 : x
  2. Step 2: Convert to fraction form
    280,345.20/420,582.20 = 80,667.24/x
  3. Step 3: Cross multiply
    280,345.20x = 420,582.20 × 80,667.24
  4. Step 4: Simplify right side
    280,345.20x = 33,927,205,267.13
  5. Step 5: Solve for x
    x = 33,927,205,267.13/280,345.20
  6. Step 6: Final answer
    x = 121,019.39

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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.