Home / 137,429.20-189,648.48-80,844.40

Finding the Fourth Proportional to 137,429.20, 189,648.48 and 80,844.40

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Solution

The fourth proportional to 137,429.20, 189,648.48 and 80,844.40 is: 111,563.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,429.20 : 189,648.48 = 80,844.40 : x
  2. Step 2: Convert to fraction form
    137,429.20/189,648.48 = 80,844.40/x
  3. Step 3: Cross multiply
    137,429.20x = 189,648.48 × 80,844.40
  4. Step 4: Simplify right side
    137,429.20x = 15,332,017,576.51
  5. Step 5: Solve for x
    x = 15,332,017,576.51/137,429.20
  6. Step 6: Final answer
    x = 111,563.03

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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.