Home / 136,205.46-188,056.12-85,238.78

Finding the Fourth Proportional to 136,205.46, 188,056.12 and 85,238.78

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Solution

The fourth proportional to 136,205.46, 188,056.12 and 85,238.78 is: 117,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,205.46 : 188,056.12 = 85,238.78 : x
  2. Step 2: Convert to fraction form
    136,205.46/188,056.12 = 85,238.78/x
  3. Step 3: Cross multiply
    136,205.46x = 188,056.12 × 85,238.78
  4. Step 4: Simplify right side
    136,205.46x = 16,029,674,240.33
  5. Step 5: Solve for x
    x = 16,029,674,240.33/136,205.46
  6. Step 6: Final answer
    x = 117,687.46

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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.