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Finding the Fourth Proportional to 78,871.46, 118,213.56 and 45,522.54

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Solution

The fourth proportional to 78,871.46, 118,213.56 and 45,522.54 is: 68,229.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,871.46 : 118,213.56 = 45,522.54 : x
  2. Step 2: Convert to fraction form
    78,871.46/118,213.56 = 45,522.54/x
  3. Step 3: Cross multiply
    78,871.46x = 118,213.56 × 45,522.54
  4. Step 4: Simplify right side
    78,871.46x = 5,381,381,513.64
  5. Step 5: Solve for x
    x = 5,381,381,513.64/78,871.46
  6. Step 6: Final answer
    x = 68,229.77

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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.