Home / 81,322.32-122,056.37-68,078.21

Finding the Fourth Proportional to 81,322.32, 122,056.37 and 68,078.21

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Solution

The fourth proportional to 81,322.32, 122,056.37 and 68,078.21 is: 102,178.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,322.32 : 122,056.37 = 68,078.21 : x
  2. Step 2: Convert to fraction form
    81,322.32/122,056.37 = 68,078.21/x
  3. Step 3: Cross multiply
    81,322.32x = 122,056.37 × 68,078.21
  4. Step 4: Simplify right side
    81,322.32x = 8,309,379,053.75
  5. Step 5: Solve for x
    x = 8,309,379,053.75/81,322.32
  6. Step 6: Final answer
    x = 102,178.34

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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.