Home / 136,709.37-188,675.24-80,120.70

Finding the Fourth Proportional to 136,709.37, 188,675.24 and 80,120.70

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Solution

The fourth proportional to 136,709.37, 188,675.24 and 80,120.70 is: 110,576.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,709.37 : 188,675.24 = 80,120.70 : x
  2. Step 2: Convert to fraction form
    136,709.37/188,675.24 = 80,120.70/x
  3. Step 3: Cross multiply
    136,709.37x = 188,675.24 × 80,120.70
  4. Step 4: Simplify right side
    136,709.37x = 15,116,791,900.86
  5. Step 5: Solve for x
    x = 15,116,791,900.86/136,709.37
  6. Step 6: Final answer
    x = 110,576.12

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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.