Home / 129,647.34-178,912.26-72,285.96

Finding the Fourth Proportional to 129,647.34, 178,912.26 and 72,285.96

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Solution

The fourth proportional to 129,647.34, 178,912.26 and 72,285.96 is: 99,754.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,647.34 : 178,912.26 = 72,285.96 : x
  2. Step 2: Convert to fraction form
    129,647.34/178,912.26 = 72,285.96/x
  3. Step 3: Cross multiply
    129,647.34x = 178,912.26 × 72,285.96
  4. Step 4: Simplify right side
    129,647.34x = 12,932,844,469.87
  5. Step 5: Solve for x
    x = 12,932,844,469.87/129,647.34
  6. Step 6: Final answer
    x = 99,754.03

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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.