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Finding the Fourth Proportional to 235,814.12, 325,451.70 and 139,039.88

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Solution

The fourth proportional to 235,814.12, 325,451.70 and 139,039.88 is: 191,891.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,814.12 : 325,451.70 = 139,039.88 : x
  2. Step 2: Convert to fraction form
    235,814.12/325,451.70 = 139,039.88/x
  3. Step 3: Cross multiply
    235,814.12x = 325,451.70 × 139,039.88
  4. Step 4: Simplify right side
    235,814.12x = 45,250,765,313.80
  5. Step 5: Solve for x
    x = 45,250,765,313.80/235,814.12
  6. Step 6: Final answer
    x = 191,891.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.