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Finding the Fourth Proportional to 78,679.80, 108,578.61 and 46,850.04

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Solution

The fourth proportional to 78,679.80, 108,578.61 and 46,850.04 is: 64,653.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,679.80 : 108,578.61 = 46,850.04 : x
  2. Step 2: Convert to fraction form
    78,679.80/108,578.61 = 46,850.04/x
  3. Step 3: Cross multiply
    78,679.80x = 108,578.61 × 46,850.04
  4. Step 4: Simplify right side
    78,679.80x = 5,086,912,221.64
  5. Step 5: Solve for x
    x = 5,086,912,221.64/78,679.80
  6. Step 6: Final answer
    x = 64,653.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.