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Finding the Fourth Proportional to 262,486.72, 393,787.51 and 85,011.67

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Solution

The fourth proportional to 262,486.72, 393,787.51 and 85,011.67 is: 127,536.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,486.72 : 393,787.51 = 85,011.67 : x
  2. Step 2: Convert to fraction form
    262,486.72/393,787.51 = 85,011.67/x
  3. Step 3: Cross multiply
    262,486.72x = 393,787.51 × 85,011.67
  4. Step 4: Simplify right side
    262,486.72x = 33,476,533,850.24
  5. Step 5: Solve for x
    x = 33,476,533,850.24/262,486.72
  6. Step 6: Final answer
    x = 127,536.10

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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.