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Finding the Fourth Proportional to 118,958.69, 178,381.53 and 69,054.09

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Solution

The fourth proportional to 118,958.69, 178,381.53 and 69,054.09 is: 103,548.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,958.69 : 178,381.53 = 69,054.09 : x
  2. Step 2: Convert to fraction form
    118,958.69/178,381.53 = 69,054.09/x
  3. Step 3: Cross multiply
    118,958.69x = 178,381.53 × 69,054.09
  4. Step 4: Simplify right side
    118,958.69x = 12,317,974,226.96
  5. Step 5: Solve for x
    x = 12,317,974,226.96/118,958.69
  6. Step 6: Final answer
    x = 103,548.33

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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.