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Finding the Fourth Proportional to 122,067, 168,438.29 and 71,090.87

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Solution

The fourth proportional to 122,067, 168,438.29 and 71,090.87 is: 98,097.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,067 : 168,438.29 = 71,090.87 : x
  2. Step 2: Convert to fraction form
    122,067/168,438.29 = 71,090.87/x
  3. Step 3: Cross multiply
    122,067x = 168,438.29 × 71,090.87
  4. Step 4: Simplify right side
    122,067x = 11,974,423,379.77
  5. Step 5: Solve for x
    x = 11,974,423,379.77/122,067
  6. Step 6: Final answer
    x = 98,097.14

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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.