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Finding the Fourth Proportional to 121,500.85, 167,671.29 and 67,785.89

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Solution

The fourth proportional to 121,500.85, 167,671.29 and 67,785.89 is: 93,544.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,500.85 : 167,671.29 = 67,785.89 : x
  2. Step 2: Convert to fraction form
    121,500.85/167,671.29 = 67,785.89/x
  3. Step 3: Cross multiply
    121,500.85x = 167,671.29 × 67,785.89
  4. Step 4: Simplify right side
    121,500.85x = 11,365,747,620.10
  5. Step 5: Solve for x
    x = 11,365,747,620.10/121,500.85
  6. Step 6: Final answer
    x = 93,544.59

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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.