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Finding the Fourth Proportional to 78,559.06, 117,857.04 and 25,968.54

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Solution

The fourth proportional to 78,559.06, 117,857.04 and 25,968.54 is: 38,958.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.06 : 117,857.04 = 25,968.54 : x
  2. Step 2: Convert to fraction form
    78,559.06/117,857.04 = 25,968.54/x
  3. Step 3: Cross multiply
    78,559.06x = 117,857.04 × 25,968.54
  4. Step 4: Simplify right side
    78,559.06x = 3,060,575,257.52
  5. Step 5: Solve for x
    x = 3,060,575,257.52/78,559.06
  6. Step 6: Final answer
    x = 38,958.91

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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.