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Finding the Fourth Proportional to 118,874.49, 178,309.94 and 28,918.05

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Solution

The fourth proportional to 118,874.49, 178,309.94 and 28,918.05 is: 43,376.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,874.49 : 178,309.94 = 28,918.05 : x
  2. Step 2: Convert to fraction form
    118,874.49/178,309.94 = 28,918.05/x
  3. Step 3: Cross multiply
    118,874.49x = 178,309.94 × 28,918.05
  4. Step 4: Simplify right side
    118,874.49x = 5,156,375,615.83
  5. Step 5: Solve for x
    x = 5,156,375,615.83/118,874.49
  6. Step 6: Final answer
    x = 43,376.64

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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.