Home / 129,912.39-179,238.29-76,199.67

Finding the Fourth Proportional to 129,912.39, 179,238.29 and 76,199.67

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Solution

The fourth proportional to 129,912.39, 179,238.29 and 76,199.67 is: 105,131.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,912.39 : 179,238.29 = 76,199.67 : x
  2. Step 2: Convert to fraction form
    129,912.39/179,238.29 = 76,199.67/x
  3. Step 3: Cross multiply
    129,912.39x = 179,238.29 × 76,199.67
  4. Step 4: Simplify right side
    129,912.39x = 13,657,898,168.37
  5. Step 5: Solve for x
    x = 13,657,898,168.37/129,912.39
  6. Step 6: Final answer
    x = 105,131.61

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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.