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Finding the Fourth Proportional to 118,907.56, 178,388.79 and 40,019.86

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Solution

The fourth proportional to 118,907.56, 178,388.79 and 40,019.86 is: 60,039.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,907.56 : 178,388.79 = 40,019.86 : x
  2. Step 2: Convert to fraction form
    118,907.56/178,388.79 = 40,019.86/x
  3. Step 3: Cross multiply
    118,907.56x = 178,388.79 × 40,019.86
  4. Step 4: Simplify right side
    118,907.56x = 7,139,094,401.37
  5. Step 5: Solve for x
    x = 7,139,094,401.37/118,907.56
  6. Step 6: Final answer
    x = 60,039.03

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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.