Home / 78,400.26-118,179-73,827.90

Finding the Fourth Proportional to 78,400.26, 118,179 and 73,827.90

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Solution

The fourth proportional to 78,400.26, 118,179 and 73,827.90 is: 111,286.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,400.26 : 118,179 = 73,827.90 : x
  2. Step 2: Convert to fraction form
    78,400.26/118,179 = 73,827.90/x
  3. Step 3: Cross multiply
    78,400.26x = 118,179 × 73,827.90
  4. Step 4: Simplify right side
    78,400.26x = 8,724,907,394.10
  5. Step 5: Solve for x
    x = 8,724,907,394.10/78,400.26
  6. Step 6: Final answer
    x = 111,286.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.