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Finding the Fourth Proportional to 129,488.67, 193,974.67 and 102,879.72

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Solution

The fourth proportional to 129,488.67, 193,974.67 and 102,879.72 is: 154,114.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,488.67 : 193,974.67 = 102,879.72 : x
  2. Step 2: Convert to fraction form
    129,488.67/193,974.67 = 102,879.72/x
  3. Step 3: Cross multiply
    129,488.67x = 193,974.67 × 102,879.72
  4. Step 4: Simplify right side
    129,488.67x = 19,956,058,252.42
  5. Step 5: Solve for x
    x = 19,956,058,252.42/129,488.67
  6. Step 6: Final answer
    x = 154,114.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.