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Finding the Fourth Proportional to 118,855.80, 178,163.76 and 74,513.70

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Solution

The fourth proportional to 118,855.80, 178,163.76 and 74,513.70 is: 111,695.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,855.80 : 178,163.76 = 74,513.70 : x
  2. Step 2: Convert to fraction form
    118,855.80/178,163.76 = 74,513.70/x
  3. Step 3: Cross multiply
    118,855.80x = 178,163.76 × 74,513.70
  4. Step 4: Simplify right side
    118,855.80x = 13,275,640,963.51
  5. Step 5: Solve for x
    x = 13,275,640,963.51/118,855.80
  6. Step 6: Final answer
    x = 111,695.36

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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.