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Finding the Fourth Proportional to 121,498.98, 167,611.42 and 79,042.02

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Solution

The fourth proportional to 121,498.98, 167,611.42 and 79,042.02 is: 109,040.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,498.98 : 167,611.42 = 79,042.02 : x
  2. Step 2: Convert to fraction form
    121,498.98/167,611.42 = 79,042.02/x
  3. Step 3: Cross multiply
    121,498.98x = 167,611.42 × 79,042.02
  4. Step 4: Simplify right side
    121,498.98x = 13,248,345,211.87
  5. Step 5: Solve for x
    x = 13,248,345,211.87/121,498.98
  6. Step 6: Final answer
    x = 109,040.79

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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.