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Finding the Fourth Proportional to 355,963.45, 533,931.36 and 131,226.67

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Solution

The fourth proportional to 355,963.45, 533,931.36 and 131,226.67 is: 196,834.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,963.45 : 533,931.36 = 131,226.67 : x
  2. Step 2: Convert to fraction form
    355,963.45/533,931.36 = 131,226.67/x
  3. Step 3: Cross multiply
    355,963.45x = 533,931.36 × 131,226.67
  4. Step 4: Simplify right side
    355,963.45x = 70,066,034,381.37
  5. Step 5: Solve for x
    x = 70,066,034,381.37/355,963.45
  6. Step 6: Final answer
    x = 196,834.91

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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.