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Finding the Fourth Proportional to 228,912.40, 343,368.60 and 71,139.60

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Solution

The fourth proportional to 228,912.40, 343,368.60 and 71,139.60 is: 106,709.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,912.40 : 343,368.60 = 71,139.60 : x
  2. Step 2: Convert to fraction form
    228,912.40/343,368.60 = 71,139.60/x
  3. Step 3: Cross multiply
    228,912.40x = 343,368.60 × 71,139.60
  4. Step 4: Simplify right side
    228,912.40x = 24,427,104,856.56
  5. Step 5: Solve for x
    x = 24,427,104,856.56/228,912.40
  6. Step 6: Final answer
    x = 106,709.40

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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.