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Finding the Fourth Proportional to 210,467.88, 315,704.55 and 70,226.50

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Solution

The fourth proportional to 210,467.88, 315,704.55 and 70,226.50 is: 105,340.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,467.88 : 315,704.55 = 70,226.50 : x
  2. Step 2: Convert to fraction form
    210,467.88/315,704.55 = 70,226.50/x
  3. Step 3: Cross multiply
    210,467.88x = 315,704.55 × 70,226.50
  4. Step 4: Simplify right side
    210,467.88x = 22,170,826,369.84
  5. Step 5: Solve for x
    x = 22,170,826,369.84/210,467.88
  6. Step 6: Final answer
    x = 105,340.67

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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.