Home / 210,038.20-315,057.30-76,922.80

Finding the Fourth Proportional to 210,038.20, 315,057.30 and 76,922.80

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Solution

The fourth proportional to 210,038.20, 315,057.30 and 76,922.80 is: 115,384.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,038.20 : 315,057.30 = 76,922.80 : x
  2. Step 2: Convert to fraction form
    210,038.20/315,057.30 = 76,922.80/x
  3. Step 3: Cross multiply
    210,038.20x = 315,057.30 × 76,922.80
  4. Step 4: Simplify right side
    210,038.20x = 24,235,089,676.44
  5. Step 5: Solve for x
    x = 24,235,089,676.44/210,038.20
  6. Step 6: Final answer
    x = 115,384.20

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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.