Home / 78,858.16-118,286.62-19,693.43

Finding the Fourth Proportional to 78,858.16, 118,286.62 and 19,693.43

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Solution

The fourth proportional to 78,858.16, 118,286.62 and 19,693.43 is: 29,539.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,858.16 : 118,286.62 = 19,693.43 : x
  2. Step 2: Convert to fraction form
    78,858.16/118,286.62 = 19,693.43/x
  3. Step 3: Cross multiply
    78,858.16x = 118,286.62 × 19,693.43
  4. Step 4: Simplify right side
    78,858.16x = 2,329,469,270.91
  5. Step 5: Solve for x
    x = 2,329,469,270.91/78,858.16
  6. Step 6: Final answer
    x = 29,539.99

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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.