Home / 78,079.32-117,076.86-40,546.80

Finding the Fourth Proportional to 78,079.32, 117,076.86 and 40,546.80

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Solution

The fourth proportional to 78,079.32, 117,076.86 and 40,546.80 is: 60,798.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,079.32 : 117,076.86 = 40,546.80 : x
  2. Step 2: Convert to fraction form
    78,079.32/117,076.86 = 40,546.80/x
  3. Step 3: Cross multiply
    78,079.32x = 117,076.86 × 40,546.80
  4. Step 4: Simplify right side
    78,079.32x = 4,747,092,027.05
  5. Step 5: Solve for x
    x = 4,747,092,027.05/78,079.32
  6. Step 6: Final answer
    x = 60,798.33

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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.