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Finding the Fourth Proportional to 99,974.54, 137,965.15 and 54,653.07

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Solution

The fourth proportional to 99,974.54, 137,965.15 and 54,653.07 is: 75,421.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,974.54 : 137,965.15 = 54,653.07 : x
  2. Step 2: Convert to fraction form
    99,974.54/137,965.15 = 54,653.07/x
  3. Step 3: Cross multiply
    99,974.54x = 137,965.15 × 54,653.07
  4. Step 4: Simplify right side
    99,974.54x = 7,540,218,863.88
  5. Step 5: Solve for x
    x = 7,540,218,863.88/99,974.54
  6. Step 6: Final answer
    x = 75,421.39

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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.