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Finding the Fourth Proportional to 118,842.53, 178,143.81 and 74,500.43

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Solution

The fourth proportional to 118,842.53, 178,143.81 and 74,500.43 is: 111,675.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,842.53 : 178,143.81 = 74,500.43 : x
  2. Step 2: Convert to fraction form
    118,842.53/178,143.81 = 74,500.43/x
  3. Step 3: Cross multiply
    118,842.53x = 178,143.81 × 74,500.43
  4. Step 4: Simplify right side
    118,842.53x = 13,271,789,556.12
  5. Step 5: Solve for x
    x = 13,271,789,556.12/118,842.53
  6. Step 6: Final answer
    x = 111,675.43

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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.