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Finding the Fourth Proportional to 121,748.22, 168,009.42 and 68,033.68

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Solution

The fourth proportional to 121,748.22, 168,009.42 and 68,033.68 is: 93,884.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,748.22 : 168,009.42 = 68,033.68 : x
  2. Step 2: Convert to fraction form
    121,748.22/168,009.42 = 68,033.68/x
  3. Step 3: Cross multiply
    121,748.22x = 168,009.42 × 68,033.68
  4. Step 4: Simplify right side
    121,748.22x = 11,430,299,117.27
  5. Step 5: Solve for x
    x = 11,430,299,117.27/121,748.22
  6. Step 6: Final answer
    x = 93,884.73

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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.