Home / 120,971.50-166,940.67-67,979.50

Finding the Fourth Proportional to 120,971.50, 166,940.67 and 67,979.50

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Solution

The fourth proportional to 120,971.50, 166,940.67 and 67,979.50 is: 93,811.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,971.50 : 166,940.67 = 67,979.50 : x
  2. Step 2: Convert to fraction form
    120,971.50/166,940.67 = 67,979.50/x
  3. Step 3: Cross multiply
    120,971.50x = 166,940.67 × 67,979.50
  4. Step 4: Simplify right side
    120,971.50x = 11,348,543,276.27
  5. Step 5: Solve for x
    x = 11,348,543,276.27/120,971.50
  6. Step 6: Final answer
    x = 93,811.71

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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.