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Finding the Fourth Proportional to 118,405.69, 163,399.86 and 68,104.69

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Solution

The fourth proportional to 118,405.69, 163,399.86 and 68,104.69 is: 93,984.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,405.69 : 163,399.86 = 68,104.69 : x
  2. Step 2: Convert to fraction form
    118,405.69/163,399.86 = 68,104.69/x
  3. Step 3: Cross multiply
    118,405.69x = 163,399.86 × 68,104.69
  4. Step 4: Simplify right side
    118,405.69x = 11,128,296,402.84
  5. Step 5: Solve for x
    x = 11,128,296,402.84/118,405.69
  6. Step 6: Final answer
    x = 93,984.48

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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.