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Finding the Fourth Proportional to 121,765.88, 168,022.36 and 67,310.71

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Solution

The fourth proportional to 121,765.88, 168,022.36 and 67,310.71 is: 92,880.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,765.88 : 168,022.36 = 67,310.71 : x
  2. Step 2: Convert to fraction form
    121,765.88/168,022.36 = 67,310.71/x
  3. Step 3: Cross multiply
    121,765.88x = 168,022.36 × 67,310.71
  4. Step 4: Simplify right side
    121,765.88x = 11,309,704,953.79
  5. Step 5: Solve for x
    x = 11,309,704,953.79/121,765.88
  6. Step 6: Final answer
    x = 92,880.74

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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.