Home / 320,056.54-480,156.29-120,378.65

Finding the Fourth Proportional to 320,056.54, 480,156.29 and 120,378.65

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Solution

The fourth proportional to 320,056.54, 480,156.29 and 120,378.65 is: 180,594.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,056.54 : 480,156.29 = 120,378.65 : x
  2. Step 2: Convert to fraction form
    320,056.54/480,156.29 = 120,378.65/x
  3. Step 3: Cross multiply
    320,056.54x = 480,156.29 × 120,378.65
  4. Step 4: Simplify right side
    320,056.54x = 57,800,563,879.37
  5. Step 5: Solve for x
    x = 57,800,563,879.37/320,056.54
  6. Step 6: Final answer
    x = 180,594.85

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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.