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Finding the Fourth Proportional to 118,084.30, 177,061.44 and 80,686.60

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Solution

The fourth proportional to 118,084.30, 177,061.44 and 80,686.60 is: 120,985.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,084.30 : 177,061.44 = 80,686.60 : x
  2. Step 2: Convert to fraction form
    118,084.30/177,061.44 = 80,686.60/x
  3. Step 3: Cross multiply
    118,084.30x = 177,061.44 × 80,686.60
  4. Step 4: Simplify right side
    118,084.30x = 14,286,485,584.70
  5. Step 5: Solve for x
    x = 14,286,485,584.70/118,084.30
  6. Step 6: Final answer
    x = 120,985.48

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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.