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Finding the Fourth Proportional to 118,791.20, 163,931.81 and 65,076.14

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Solution

The fourth proportional to 118,791.20, 163,931.81 and 65,076.14 is: 89,805.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,791.20 : 163,931.81 = 65,076.14 : x
  2. Step 2: Convert to fraction form
    118,791.20/163,931.81 = 65,076.14/x
  3. Step 3: Cross multiply
    118,791.20x = 163,931.81 × 65,076.14
  4. Step 4: Simplify right side
    118,791.20x = 10,668,048,272.97
  5. Step 5: Solve for x
    x = 10,668,048,272.97/118,791.20
  6. Step 6: Final answer
    x = 89,805.04

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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.