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Finding the Fourth Proportional to 121,021.50, 167,009.67 and 68,029.50

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Solution

The fourth proportional to 121,021.50, 167,009.67 and 68,029.50 is: 93,880.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.50 : 167,009.67 = 68,029.50 : x
  2. Step 2: Convert to fraction form
    121,021.50/167,009.67 = 68,029.50/x
  3. Step 3: Cross multiply
    121,021.50x = 167,009.67 × 68,029.50
  4. Step 4: Simplify right side
    121,021.50x = 11,361,584,345.27
  5. Step 5: Solve for x
    x = 11,361,584,345.27/121,021.50
  6. Step 6: Final answer
    x = 93,880.71

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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.