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Finding the Fourth Proportional to 210,571.59, 315,890.18 and 126,311.95

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Solution

The fourth proportional to 210,571.59, 315,890.18 and 126,311.95 is: 189,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,571.59 : 315,890.18 = 126,311.95 : x
  2. Step 2: Convert to fraction form
    210,571.59/315,890.18 = 126,311.95/x
  3. Step 3: Cross multiply
    210,571.59x = 315,890.18 × 126,311.95
  4. Step 4: Simplify right side
    210,571.59x = 39,900,704,621.65
  5. Step 5: Solve for x
    x = 39,900,704,621.65/210,571.59
  6. Step 6: Final answer
    x = 189,487.60

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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.