Home / 210,028.20-315,042.30-76,912.80

Finding the Fourth Proportional to 210,028.20, 315,042.30 and 76,912.80

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Solution

The fourth proportional to 210,028.20, 315,042.30 and 76,912.80 is: 115,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,028.20 : 315,042.30 = 76,912.80 : x
  2. Step 2: Convert to fraction form
    210,028.20/315,042.30 = 76,912.80/x
  3. Step 3: Cross multiply
    210,028.20x = 315,042.30 × 76,912.80
  4. Step 4: Simplify right side
    210,028.20x = 24,230,785,411.44
  5. Step 5: Solve for x
    x = 24,230,785,411.44/210,028.20
  6. Step 6: Final answer
    x = 115,369.20

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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.