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Finding the Fourth Proportional to 238,705.58, 357,981.73 and 78,745.57

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Solution

The fourth proportional to 238,705.58, 357,981.73 and 78,745.57 is: 118,093.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,705.58 : 357,981.73 = 78,745.57 : x
  2. Step 2: Convert to fraction form
    238,705.58/357,981.73 = 78,745.57/x
  3. Step 3: Cross multiply
    238,705.58x = 357,981.73 × 78,745.57
  4. Step 4: Simplify right side
    238,705.58x = 28,189,474,286.62
  5. Step 5: Solve for x
    x = 28,189,474,286.62/238,705.58
  6. Step 6: Final answer
    x = 118,093.07

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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.