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Finding the Fourth Proportional to 118,387.89, 177,519.47 and 80,958.60

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Solution

The fourth proportional to 118,387.89, 177,519.47 and 80,958.60 is: 121,395.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,387.89 : 177,519.47 = 80,958.60 : x
  2. Step 2: Convert to fraction form
    118,387.89/177,519.47 = 80,958.60/x
  3. Step 3: Cross multiply
    118,387.89x = 177,519.47 × 80,958.60
  4. Step 4: Simplify right side
    118,387.89x = 14,371,727,359.15
  5. Step 5: Solve for x
    x = 14,371,727,359.15/118,387.89
  6. Step 6: Final answer
    x = 121,395.25

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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.