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Finding the Fourth Proportional to 245,181, 367,771.50 and 78,969

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Solution

The fourth proportional to 245,181, 367,771.50 and 78,969 is: 118,453.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,181 : 367,771.50 = 78,969 : x
  2. Step 2: Convert to fraction form
    245,181/367,771.50 = 78,969/x
  3. Step 3: Cross multiply
    245,181x = 367,771.50 × 78,969
  4. Step 4: Simplify right side
    245,181x = 29,042,547,583.50
  5. Step 5: Solve for x
    x = 29,042,547,583.50/245,181
  6. Step 6: Final answer
    x = 118,453.50

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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.