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Finding the Fourth Proportional to 121,362.38, 167,485.76 and 67,647.79

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Solution

The fourth proportional to 121,362.38, 167,485.76 and 67,647.79 is: 93,357.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,362.38 : 167,485.76 = 67,647.79 : x
  2. Step 2: Convert to fraction form
    121,362.38/167,485.76 = 67,647.79/x
  3. Step 3: Cross multiply
    121,362.38x = 167,485.76 × 67,647.79
  4. Step 4: Simplify right side
    121,362.38x = 11,330,040,344.80
  5. Step 5: Solve for x
    x = 11,330,040,344.80/121,362.38
  6. Step 6: Final answer
    x = 93,357.10

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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.