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Finding the Fourth Proportional to 148,898.20, 223,347.30 and 85,912.60

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Solution

The fourth proportional to 148,898.20, 223,347.30 and 85,912.60 is: 128,868.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,898.20 : 223,347.30 = 85,912.60 : x
  2. Step 2: Convert to fraction form
    148,898.20/223,347.30 = 85,912.60/x
  3. Step 3: Cross multiply
    148,898.20x = 223,347.30 × 85,912.60
  4. Step 4: Simplify right side
    148,898.20x = 19,188,347,245.98
  5. Step 5: Solve for x
    x = 19,188,347,245.98/148,898.20
  6. Step 6: Final answer
    x = 128,868.90

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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.