Home / 78,989.26-118,418.28-55,228.87

Finding the Fourth Proportional to 78,989.26, 118,418.28 and 55,228.87

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Solution

The fourth proportional to 78,989.26, 118,418.28 and 55,228.87 is: 82,797.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,989.26 : 118,418.28 = 55,228.87 : x
  2. Step 2: Convert to fraction form
    78,989.26/118,418.28 = 55,228.87/x
  3. Step 3: Cross multiply
    78,989.26x = 118,418.28 × 55,228.87
  4. Step 4: Simplify right side
    78,989.26x = 6,540,107,791.74
  5. Step 5: Solve for x
    x = 6,540,107,791.74/78,989.26
  6. Step 6: Final answer
    x = 82,797.43

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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.