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Finding the Fourth Proportional to 57,938.40, 87,013.20 and 50,680.80

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Solution

The fourth proportional to 57,938.40, 87,013.20 and 50,680.80 is: 76,113.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,938.40 : 87,013.20 = 50,680.80 : x
  2. Step 2: Convert to fraction form
    57,938.40/87,013.20 = 50,680.80/x
  3. Step 3: Cross multiply
    57,938.40x = 87,013.20 × 50,680.80
  4. Step 4: Simplify right side
    57,938.40x = 4,409,898,586.56
  5. Step 5: Solve for x
    x = 4,409,898,586.56/57,938.40
  6. Step 6: Final answer
    x = 76,113.57

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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.