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Finding the Fourth Proportional to 245,191, 367,786.52 and 78,979

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Solution

The fourth proportional to 245,191, 367,786.52 and 78,979 is: 118,468.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,191 : 367,786.52 = 78,979 : x
  2. Step 2: Convert to fraction form
    245,191/367,786.52 = 78,979/x
  3. Step 3: Cross multiply
    245,191x = 367,786.52 × 78,979
  4. Step 4: Simplify right side
    245,191x = 29,047,411,563.08
  5. Step 5: Solve for x
    x = 29,047,411,563.08/245,191
  6. Step 6: Final answer
    x = 118,468.51

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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.