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Finding the Fourth Proportional to 121,818.47, 168,110.54 and 67,367.80

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Solution

The fourth proportional to 121,818.47, 168,110.54 and 67,367.80 is: 92,968.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,818.47 : 168,110.54 = 67,367.80 : x
  2. Step 2: Convert to fraction form
    121,818.47/168,110.54 = 67,367.80/x
  3. Step 3: Cross multiply
    121,818.47x = 168,110.54 × 67,367.80
  4. Step 4: Simplify right side
    121,818.47x = 11,325,236,984.76
  5. Step 5: Solve for x
    x = 11,325,236,984.76/121,818.47
  6. Step 6: Final answer
    x = 92,968.15

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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.