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Finding the Fourth Proportional to 118,800.21, 178,200.31 and 39,914.43

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Solution

The fourth proportional to 118,800.21, 178,200.31 and 39,914.43 is: 59,871.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,800.21 : 178,200.31 = 39,914.43 : x
  2. Step 2: Convert to fraction form
    118,800.21/178,200.31 = 39,914.43/x
  3. Step 3: Cross multiply
    118,800.21x = 178,200.31 × 39,914.43
  4. Step 4: Simplify right side
    118,800.21x = 7,112,763,799.47
  5. Step 5: Solve for x
    x = 7,112,763,799.47/118,800.21
  6. Step 6: Final answer
    x = 59,871.64

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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.