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Finding the Fourth Proportional to 118,083.30, 177,059.94 and 80,685.60

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Solution

The fourth proportional to 118,083.30, 177,059.94 and 80,685.60 is: 120,983.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,083.30 : 177,059.94 = 80,685.60 : x
  2. Step 2: Convert to fraction form
    118,083.30/177,059.94 = 80,685.60/x
  3. Step 3: Cross multiply
    118,083.30x = 177,059.94 × 80,685.60
  4. Step 4: Simplify right side
    118,083.30x = 14,286,187,494.86
  5. Step 5: Solve for x
    x = 14,286,187,494.86/118,083.30
  6. Step 6: Final answer
    x = 120,983.98

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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.