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Finding the Fourth Proportional to 140,311.95, 193,685.90 and 86,618.67

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Solution

The fourth proportional to 140,311.95, 193,685.90 and 86,618.67 is: 119,567.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,311.95 : 193,685.90 = 86,618.67 : x
  2. Step 2: Convert to fraction form
    140,311.95/193,685.90 = 86,618.67/x
  3. Step 3: Cross multiply
    140,311.95x = 193,685.90 × 86,618.67
  4. Step 4: Simplify right side
    140,311.95x = 16,776,814,622.66
  5. Step 5: Solve for x
    x = 16,776,814,622.66/140,311.95
  6. Step 6: Final answer
    x = 119,567.97

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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.