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Finding the Fourth Proportional to 118,928.45, 164,121.30 and 65,212.35

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Solution

The fourth proportional to 118,928.45, 164,121.30 and 65,212.35 is: 89,993.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,928.45 : 164,121.30 = 65,212.35 : x
  2. Step 2: Convert to fraction form
    118,928.45/164,121.30 = 65,212.35/x
  3. Step 3: Cross multiply
    118,928.45x = 164,121.30 × 65,212.35
  4. Step 4: Simplify right side
    118,928.45x = 10,702,735,658.06
  5. Step 5: Solve for x
    x = 10,702,735,658.06/118,928.45
  6. Step 6: Final answer
    x = 89,993.07

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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.