Home / 320,085.22-480,128.20-83,427.70

Finding the Fourth Proportional to 320,085.22, 480,128.20 and 83,427.70

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Solution

The fourth proportional to 320,085.22, 480,128.20 and 83,427.70 is: 125,141.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,085.22 : 480,128.20 = 83,427.70 : x
  2. Step 2: Convert to fraction form
    320,085.22/480,128.20 = 83,427.70/x
  3. Step 3: Cross multiply
    320,085.22x = 480,128.20 × 83,427.70
  4. Step 4: Simplify right side
    320,085.22x = 40,055,991,431.14
  5. Step 5: Solve for x
    x = 40,055,991,431.14/320,085.22
  6. Step 6: Final answer
    x = 125,141.65

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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.