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Finding the Fourth Proportional to 210,217.20, 315,228.60 and 91,827.60

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Solution

The fourth proportional to 210,217.20, 315,228.60 and 91,827.60 is: 137,698.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,217.20 : 315,228.60 = 91,827.60 : x
  2. Step 2: Convert to fraction form
    210,217.20/315,228.60 = 91,827.60/x
  3. Step 3: Cross multiply
    210,217.20x = 315,228.60 × 91,827.60
  4. Step 4: Simplify right side
    210,217.20x = 28,946,685,789.36
  5. Step 5: Solve for x
    x = 28,946,685,789.36/210,217.20
  6. Step 6: Final answer
    x = 137,698.94

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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.