Home / 128,119.42-191,736.26-80,071.03

Finding the Fourth Proportional to 128,119.42, 191,736.26 and 80,071.03

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Solution

The fourth proportional to 128,119.42, 191,736.26 and 80,071.03 is: 119,829.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,119.42 : 191,736.26 = 80,071.03 : x
  2. Step 2: Convert to fraction form
    128,119.42/191,736.26 = 80,071.03/x
  3. Step 3: Cross multiply
    128,119.42x = 191,736.26 × 80,071.03
  4. Step 4: Simplify right side
    128,119.42x = 15,352,519,826.55
  5. Step 5: Solve for x
    x = 15,352,519,826.55/128,119.42
  6. Step 6: Final answer
    x = 119,829.76

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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.