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Finding the Fourth Proportional to 228,916.40, 343,374.60 and 71,143.60

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Solution

The fourth proportional to 228,916.40, 343,374.60 and 71,143.60 is: 106,715.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,916.40 : 343,374.60 = 71,143.60 : x
  2. Step 2: Convert to fraction form
    228,916.40/343,374.60 = 71,143.60/x
  3. Step 3: Cross multiply
    228,916.40x = 343,374.60 × 71,143.60
  4. Step 4: Simplify right side
    228,916.40x = 24,428,905,192.56
  5. Step 5: Solve for x
    x = 24,428,905,192.56/228,916.40
  6. Step 6: Final answer
    x = 106,715.40

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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.