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Finding the Fourth Proportional to 335,423.78, 503,135.67 and 86,105.78

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Solution

The fourth proportional to 335,423.78, 503,135.67 and 86,105.78 is: 129,158.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,423.78 : 503,135.67 = 86,105.78 : x
  2. Step 2: Convert to fraction form
    335,423.78/503,135.67 = 86,105.78/x
  3. Step 3: Cross multiply
    335,423.78x = 503,135.67 × 86,105.78
  4. Step 4: Simplify right side
    335,423.78x = 43,322,889,311.17
  5. Step 5: Solve for x
    x = 43,322,889,311.17/335,423.78
  6. Step 6: Final answer
    x = 129,158.67

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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.