Home / 131,405.94-197,233.51-81,334.57

Finding the Fourth Proportional to 131,405.94, 197,233.51 and 81,334.57

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Solution

The fourth proportional to 131,405.94, 197,233.51 and 81,334.57 is: 122,078.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,405.94 : 197,233.51 = 81,334.57 : x
  2. Step 2: Convert to fraction form
    131,405.94/197,233.51 = 81,334.57/x
  3. Step 3: Cross multiply
    131,405.94x = 197,233.51 × 81,334.57
  4. Step 4: Simplify right side
    131,405.94x = 16,041,902,725.44
  5. Step 5: Solve for x
    x = 16,041,902,725.44/131,405.94
  6. Step 6: Final answer
    x = 122,078.98

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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.