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Finding the Fourth Proportional to 118,970.63, 164,208.20 and 80,793.90

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Solution

The fourth proportional to 118,970.63, 164,208.20 and 80,793.90 is: 111,515.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,970.63 : 164,208.20 = 80,793.90 : x
  2. Step 2: Convert to fraction form
    118,970.63/164,208.20 = 80,793.90/x
  3. Step 3: Cross multiply
    118,970.63x = 164,208.20 × 80,793.90
  4. Step 4: Simplify right side
    118,970.63x = 13,267,020,486.01
  5. Step 5: Solve for x
    x = 13,267,020,486.01/118,970.63
  6. Step 6: Final answer
    x = 111,515.09

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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.