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Finding the Fourth Proportional to 121,656.91, 167,884.88 and 67,942.87

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Solution

The fourth proportional to 121,656.91, 167,884.88 and 67,942.87 is: 93,760.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,656.91 : 167,884.88 = 67,942.87 : x
  2. Step 2: Convert to fraction form
    121,656.91/167,884.88 = 67,942.87/x
  3. Step 3: Cross multiply
    121,656.91x = 167,884.88 × 67,942.87
  4. Step 4: Simplify right side
    121,656.91x = 11,406,580,237.09
  5. Step 5: Solve for x
    x = 11,406,580,237.09/121,656.91
  6. Step 6: Final answer
    x = 93,760.23

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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.