Home / 129,223.89-178,344.99-72,635.27

Finding the Fourth Proportional to 129,223.89, 178,344.99 and 72,635.27

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Solution

The fourth proportional to 129,223.89, 178,344.99 and 72,635.27 is: 100,245.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,223.89 : 178,344.99 = 72,635.27 : x
  2. Step 2: Convert to fraction form
    129,223.89/178,344.99 = 72,635.27/x
  3. Step 3: Cross multiply
    129,223.89x = 178,344.99 × 72,635.27
  4. Step 4: Simplify right side
    129,223.89x = 12,954,135,610.07
  5. Step 5: Solve for x
    x = 12,954,135,610.07/129,223.89
  6. Step 6: Final answer
    x = 100,245.67

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1.5x scale

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.