Home / 210,121.75-315,140.25-76,956.54

Finding the Fourth Proportional to 210,121.75, 315,140.25 and 76,956.54

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Solution

The fourth proportional to 210,121.75, 315,140.25 and 76,956.54 is: 115,419.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,121.75 : 315,140.25 = 76,956.54 : x
  2. Step 2: Convert to fraction form
    210,121.75/315,140.25 = 76,956.54/x
  3. Step 3: Cross multiply
    210,121.75x = 315,140.25 × 76,956.54
  4. Step 4: Simplify right side
    210,121.75x = 24,252,102,361.55
  5. Step 5: Solve for x
    x = 24,252,102,361.55/210,121.75
  6. Step 6: Final answer
    x = 115,419.29

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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.