Home / 129,771.37-179,096.87-78,772.40

Finding the Fourth Proportional to 129,771.37, 179,096.87 and 78,772.40

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Solution

The fourth proportional to 129,771.37, 179,096.87 and 78,772.40 is: 108,713.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,771.37 : 179,096.87 = 78,772.40 : x
  2. Step 2: Convert to fraction form
    129,771.37/179,096.87 = 78,772.40/x
  3. Step 3: Cross multiply
    129,771.37x = 179,096.87 × 78,772.40
  4. Step 4: Simplify right side
    129,771.37x = 14,107,890,255.45
  5. Step 5: Solve for x
    x = 14,107,890,255.45/129,771.37
  6. Step 6: Final answer
    x = 108,713.43

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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.