Home / 78,676.20-118,244.70-68,538.60

Finding the Fourth Proportional to 78,676.20, 118,244.70 and 68,538.60

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Solution

The fourth proportional to 78,676.20, 118,244.70 and 68,538.60 is: 103,008.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,676.20 : 118,244.70 = 68,538.60 : x
  2. Step 2: Convert to fraction form
    78,676.20/118,244.70 = 68,538.60/x
  3. Step 3: Cross multiply
    78,676.20x = 118,244.70 × 68,538.60
  4. Step 4: Simplify right side
    78,676.20x = 8,104,326,195.42
  5. Step 5: Solve for x
    x = 8,104,326,195.42/78,676.20
  6. Step 6: Final answer
    x = 103,008.61

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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.