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Finding the Fourth Proportional to 261,385.61, 392,119.41 and 111,626.69

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Solution

The fourth proportional to 261,385.61, 392,119.41 and 111,626.69 is: 167,457.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,385.61 : 392,119.41 = 111,626.69 : x
  2. Step 2: Convert to fraction form
    261,385.61/392,119.41 = 111,626.69/x
  3. Step 3: Cross multiply
    261,385.61x = 392,119.41 × 111,626.69
  4. Step 4: Simplify right side
    261,385.61x = 43,770,991,823.05
  5. Step 5: Solve for x
    x = 43,770,991,823.05/261,385.61
  6. Step 6: Final answer
    x = 167,457.54

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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.