Home / 78,145.37-117,361.06-71,557.71

Finding the Fourth Proportional to 78,145.37, 117,361.06 and 71,557.71

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Solution

The fourth proportional to 78,145.37, 117,361.06 and 71,557.71 is: 107,467.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,145.37 : 117,361.06 = 71,557.71 : x
  2. Step 2: Convert to fraction form
    78,145.37/117,361.06 = 71,557.71/x
  3. Step 3: Cross multiply
    78,145.37x = 117,361.06 × 71,557.71
  4. Step 4: Simplify right side
    78,145.37x = 8,398,088,517.88
  5. Step 5: Solve for x
    x = 8,398,088,517.88/78,145.37
  6. Step 6: Final answer
    x = 107,467.51

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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.