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Finding the Fourth Proportional to 121,235.89, 167,310.70 and 67,520.91

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Solution

The fourth proportional to 121,235.89, 167,310.70 and 67,520.91 is: 93,181.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,235.89 : 167,310.70 = 67,520.91 : x
  2. Step 2: Convert to fraction form
    121,235.89/167,310.70 = 67,520.91/x
  3. Step 3: Cross multiply
    121,235.89x = 167,310.70 × 67,520.91
  4. Step 4: Simplify right side
    121,235.89x = 11,296,971,014.43
  5. Step 5: Solve for x
    x = 11,296,971,014.43/121,235.89
  6. Step 6: Final answer
    x = 93,181.74

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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.