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Finding the Fourth Proportional to 118,992.75, 164,212.16 and 65,280.51

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Solution

The fourth proportional to 118,992.75, 164,212.16 and 65,280.51 is: 90,088.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,992.75 : 164,212.16 = 65,280.51 : x
  2. Step 2: Convert to fraction form
    118,992.75/164,212.16 = 65,280.51/x
  3. Step 3: Cross multiply
    118,992.75x = 164,212.16 × 65,280.51
  4. Step 4: Simplify right side
    118,992.75x = 10,719,853,226.60
  5. Step 5: Solve for x
    x = 10,719,853,226.60/118,992.75
  6. Step 6: Final answer
    x = 90,088.29

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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.