Home / 78,619.88-117,741.18-69,163.84

Finding the Fourth Proportional to 78,619.88, 117,741.18 and 69,163.84

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Solution

The fourth proportional to 78,619.88, 117,741.18 and 69,163.84 is: 103,579.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,619.88 : 117,741.18 = 69,163.84 : x
  2. Step 2: Convert to fraction form
    78,619.88/117,741.18 = 69,163.84/x
  3. Step 3: Cross multiply
    78,619.88x = 117,741.18 × 69,163.84
  4. Step 4: Simplify right side
    78,619.88x = 8,143,432,134.93
  5. Step 5: Solve for x
    x = 8,143,432,134.93/78,619.88
  6. Step 6: Final answer
    x = 103,579.81

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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.