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Finding the Fourth Proportional to 78,375.56, 117,714.60 and 67,156.25

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Solution

The fourth proportional to 78,375.56, 117,714.60 and 67,156.25 is: 100,863.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,375.56 : 117,714.60 = 67,156.25 : x
  2. Step 2: Convert to fraction form
    78,375.56/117,714.60 = 67,156.25/x
  3. Step 3: Cross multiply
    78,375.56x = 117,714.60 × 67,156.25
  4. Step 4: Simplify right side
    78,375.56x = 7,905,270,517.68
  5. Step 5: Solve for x
    x = 7,905,270,517.68/78,375.56
  6. Step 6: Final answer
    x = 100,863.98

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1.5x scale

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.