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Finding the Fourth Proportional to 117,640.78, 162,363.63 and 85,914.70

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Solution

The fourth proportional to 117,640.78, 162,363.63 and 85,914.70 is: 118,576.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,640.78 : 162,363.63 = 85,914.70 : x
  2. Step 2: Convert to fraction form
    117,640.78/162,363.63 = 85,914.70/x
  3. Step 3: Cross multiply
    117,640.78x = 162,363.63 × 85,914.70
  4. Step 4: Simplify right side
    117,640.78x = 13,949,422,562.36
  5. Step 5: Solve for x
    x = 13,949,422,562.36/117,640.78
  6. Step 6: Final answer
    x = 118,576.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.