Home / 86,986.96-120,099.83-66,807.78

Finding the Fourth Proportional to 86,986.96, 120,099.83 and 66,807.78

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Solution

The fourth proportional to 86,986.96, 120,099.83 and 66,807.78 is: 92,239.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,986.96 : 120,099.83 = 66,807.78 : x
  2. Step 2: Convert to fraction form
    86,986.96/120,099.83 = 66,807.78/x
  3. Step 3: Cross multiply
    86,986.96x = 120,099.83 × 66,807.78
  4. Step 4: Simplify right side
    86,986.96x = 8,023,603,020.68
  5. Step 5: Solve for x
    x = 8,023,603,020.68/86,986.96
  6. Step 6: Final answer
    x = 92,239.15

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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.