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Finding the Fourth Proportional to 228,912.80, 343,421.40 and 71,157.20

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Solution

The fourth proportional to 228,912.80, 343,421.40 and 71,157.20 is: 106,752.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,912.80 : 343,421.40 = 71,157.20 : x
  2. Step 2: Convert to fraction form
    228,912.80/343,421.40 = 71,157.20/x
  3. Step 3: Cross multiply
    228,912.80x = 343,421.40 × 71,157.20
  4. Step 4: Simplify right side
    228,912.80x = 24,436,905,244.08
  5. Step 5: Solve for x
    x = 24,436,905,244.08/228,912.80
  6. Step 6: Final answer
    x = 106,752.03

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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.