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Finding the Fourth Proportional to 238,775.85, 358,086.55 and 78,815.85

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Solution

The fourth proportional to 238,775.85, 358,086.55 and 78,815.85 is: 118,198.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,775.85 : 358,086.55 = 78,815.85 : x
  2. Step 2: Convert to fraction form
    238,775.85/358,086.55 = 78,815.85/x
  3. Step 3: Cross multiply
    238,775.85x = 358,086.55 × 78,815.85
  4. Step 4: Simplify right side
    238,775.85x = 28,222,895,811.82
  5. Step 5: Solve for x
    x = 28,222,895,811.82/238,775.85
  6. Step 6: Final answer
    x = 118,198.28

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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.