Home / 78,827.94-118,249.20-31,431.60

Finding the Fourth Proportional to 78,827.94, 118,249.20 and 31,431.60

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Solution

The fourth proportional to 78,827.94, 118,249.20 and 31,431.60 is: 47,150.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,827.94 : 118,249.20 = 31,431.60 : x
  2. Step 2: Convert to fraction form
    78,827.94/118,249.20 = 31,431.60/x
  3. Step 3: Cross multiply
    78,827.94x = 118,249.20 × 31,431.60
  4. Step 4: Simplify right side
    78,827.94x = 3,716,761,554.72
  5. Step 5: Solve for x
    x = 3,716,761,554.72/78,827.94
  6. Step 6: Final answer
    x = 47,150.31

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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.