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Finding the Fourth Proportional to 118,239.72, 163,197.54 and 80,529

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Solution

The fourth proportional to 118,239.72, 163,197.54 and 80,529 is: 111,148.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,239.72 : 163,197.54 = 80,529 : x
  2. Step 2: Convert to fraction form
    118,239.72/163,197.54 = 80,529/x
  3. Step 3: Cross multiply
    118,239.72x = 163,197.54 × 80,529
  4. Step 4: Simplify right side
    118,239.72x = 13,142,134,698.66
  5. Step 5: Solve for x
    x = 13,142,134,698.66/118,239.72
  6. Step 6: Final answer
    x = 111,148.22

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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.