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Finding the Fourth Proportional to 211,626.78, 317,487.21 and 99,247.11

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Solution

The fourth proportional to 211,626.78, 317,487.21 and 99,247.11 is: 148,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    211,626.78 : 317,487.21 = 99,247.11 : x
  2. Step 2: Convert to fraction form
    211,626.78/317,487.21 = 99,247.11/x
  3. Step 3: Cross multiply
    211,626.78x = 317,487.21 × 99,247.11
  4. Step 4: Simplify right side
    211,626.78x = 31,509,688,054.46
  5. Step 5: Solve for x
    x = 31,509,688,054.46/211,626.78
  6. Step 6: Final answer
    x = 148,892.73

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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.