Home / 136,972.80-189,043.20-80,409.60

Finding the Fourth Proportional to 136,972.80, 189,043.20 and 80,409.60

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Solution

The fourth proportional to 136,972.80, 189,043.20 and 80,409.60 is: 110,977.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,972.80 : 189,043.20 = 80,409.60 : x
  2. Step 2: Convert to fraction form
    136,972.80/189,043.20 = 80,409.60/x
  3. Step 3: Cross multiply
    136,972.80x = 189,043.20 × 80,409.60
  4. Step 4: Simplify right side
    136,972.80x = 15,200,888,094.72
  5. Step 5: Solve for x
    x = 15,200,888,094.72/136,972.80
  6. Step 6: Final answer
    x = 110,977.42

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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.