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Finding the Fourth Proportional to 121,485.76, 167,668.82 and 73,729.87

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Solution

The fourth proportional to 121,485.76, 167,668.82 and 73,729.87 is: 101,758.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,485.76 : 167,668.82 = 73,729.87 : x
  2. Step 2: Convert to fraction form
    121,485.76/167,668.82 = 73,729.87/x
  3. Step 3: Cross multiply
    121,485.76x = 167,668.82 × 73,729.87
  4. Step 4: Simplify right side
    121,485.76x = 12,362,199,933.00
  5. Step 5: Solve for x
    x = 12,362,199,933.00/121,485.76
  6. Step 6: Final answer
    x = 101,758.43

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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.