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Finding the Fourth Proportional to 210,571.14, 315,889.52 and 126,311.51

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Solution

The fourth proportional to 210,571.14, 315,889.52 and 126,311.51 is: 189,486.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,571.14 : 315,889.52 = 126,311.51 : x
  2. Step 2: Convert to fraction form
    210,571.14/315,889.52 = 126,311.51/x
  3. Step 3: Cross multiply
    210,571.14x = 315,889.52 × 126,311.51
  4. Step 4: Simplify right side
    210,571.14x = 39,900,480,053.37
  5. Step 5: Solve for x
    x = 39,900,480,053.37/210,571.14
  6. Step 6: Final answer
    x = 189,486.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.