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Finding the Fourth Proportional to 335,403.78, 503,105.67 and 86,085.78

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Solution

The fourth proportional to 335,403.78, 503,105.67 and 86,085.78 is: 129,128.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,403.78 : 503,105.67 = 86,085.78 : x
  2. Step 2: Convert to fraction form
    335,403.78/503,105.67 = 86,085.78/x
  3. Step 3: Cross multiply
    335,403.78x = 503,105.67 × 86,085.78
  4. Step 4: Simplify right side
    335,403.78x = 43,310,244,024.37
  5. Step 5: Solve for x
    x = 43,310,244,024.37/335,403.78
  6. Step 6: Final answer
    x = 129,128.67

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Similar ratio
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1.5x scale

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.