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Finding the Fourth Proportional to 235,121.76, 324,473.40 and 139,628.76

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Solution

The fourth proportional to 235,121.76, 324,473.40 and 139,628.76 is: 192,690.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,121.76 : 324,473.40 = 139,628.76 : x
  2. Step 2: Convert to fraction form
    235,121.76/324,473.40 = 139,628.76/x
  3. Step 3: Cross multiply
    235,121.76x = 324,473.40 × 139,628.76
  4. Step 4: Simplify right side
    235,121.76x = 45,305,818,494.98
  5. Step 5: Solve for x
    x = 45,305,818,494.98/235,121.76
  6. Step 6: Final answer
    x = 192,690.88

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1.5x scale

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.