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Finding the Fourth Proportional to 210,422.21, 315,425.54 and 83,986.27

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Solution

The fourth proportional to 210,422.21, 315,425.54 and 83,986.27 is: 125,896.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,422.21 : 315,425.54 = 83,986.27 : x
  2. Step 2: Convert to fraction form
    210,422.21/315,425.54 = 83,986.27/x
  3. Step 3: Cross multiply
    210,422.21x = 315,425.54 × 83,986.27
  4. Step 4: Simplify right side
    210,422.21x = 26,491,413,988.74
  5. Step 5: Solve for x
    x = 26,491,413,988.74/210,422.21
  6. Step 6: Final answer
    x = 125,896.48

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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.