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Finding the Fourth Proportional to 210,375.20, 315,212.88 and 147,914.72

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Solution

The fourth proportional to 210,375.20, 315,212.88 and 147,914.72 is: 221,626.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,375.20 : 315,212.88 = 147,914.72 : x
  2. Step 2: Convert to fraction form
    210,375.20/315,212.88 = 147,914.72/x
  3. Step 3: Cross multiply
    210,375.20x = 315,212.88 × 147,914.72
  4. Step 4: Simplify right side
    210,375.20x = 46,624,624,885.59
  5. Step 5: Solve for x
    x = 46,624,624,885.59/210,375.20
  6. Step 6: Final answer
    x = 221,626.05

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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.