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Finding the Fourth Proportional to 118,222.72, 163,174.08 and 80,512

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Solution

The fourth proportional to 118,222.72, 163,174.08 and 80,512 is: 111,124.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,222.72 : 163,174.08 = 80,512 : x
  2. Step 2: Convert to fraction form
    118,222.72/163,174.08 = 80,512/x
  3. Step 3: Cross multiply
    118,222.72x = 163,174.08 × 80,512
  4. Step 4: Simplify right side
    118,222.72x = 13,137,471,528.96
  5. Step 5: Solve for x
    x = 13,137,471,528.96/118,222.72
  6. Step 6: Final answer
    x = 111,124.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.