Home / 189,138.72-261,011.37-104,257.20

Finding the Fourth Proportional to 189,138.72, 261,011.37 and 104,257.20

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Solution

The fourth proportional to 189,138.72, 261,011.37 and 104,257.20 is: 143,874.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,138.72 : 261,011.37 = 104,257.20 : x
  2. Step 2: Convert to fraction form
    189,138.72/261,011.37 = 104,257.20/x
  3. Step 3: Cross multiply
    189,138.72x = 261,011.37 × 104,257.20
  4. Step 4: Simplify right side
    189,138.72x = 27,212,314,604.36
  5. Step 5: Solve for x
    x = 27,212,314,604.36/189,138.72
  6. Step 6: Final answer
    x = 143,874.90

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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.