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Finding the Fourth Proportional to 118,981.70, 164,223.32 and 80,804.87

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Solution

The fourth proportional to 118,981.70, 164,223.32 and 80,804.87 is: 111,530.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,981.70 : 164,223.32 = 80,804.87 : x
  2. Step 2: Convert to fraction form
    118,981.70/164,223.32 = 80,804.87/x
  3. Step 3: Cross multiply
    118,981.70x = 164,223.32 × 80,804.87
  4. Step 4: Simplify right side
    118,981.70x = 13,270,042,798.43
  5. Step 5: Solve for x
    x = 13,270,042,798.43/118,981.70
  6. Step 6: Final answer
    x = 111,530.12

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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.