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Finding the Fourth Proportional to 121,628.52, 167,817.42 and 73,879.02

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Solution

The fourth proportional to 121,628.52, 167,817.42 and 73,879.02 is: 101,934.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,628.52 : 167,817.42 = 73,879.02 : x
  2. Step 2: Convert to fraction form
    121,628.52/167,817.42 = 73,879.02/x
  3. Step 3: Cross multiply
    121,628.52x = 167,817.42 × 73,879.02
  4. Step 4: Simplify right side
    121,628.52x = 12,398,186,528.53
  5. Step 5: Solve for x
    x = 12,398,186,528.53/121,628.52
  6. Step 6: Final answer
    x = 101,934.86

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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.