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Finding the Fourth Proportional to 210,163.16, 315,247.49 and 69,921.78

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Solution

The fourth proportional to 210,163.16, 315,247.49 and 69,921.78 is: 104,883.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,163.16 : 315,247.49 = 69,921.78 : x
  2. Step 2: Convert to fraction form
    210,163.16/315,247.49 = 69,921.78/x
  3. Step 3: Cross multiply
    210,163.16x = 315,247.49 × 69,921.78
  4. Step 4: Simplify right side
    210,163.16x = 22,042,665,291.72
  5. Step 5: Solve for x
    x = 22,042,665,291.72/210,163.16
  6. Step 6: Final answer
    x = 104,883.59

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1.5x scale

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.