Home / 78,915.21-108,901.20-43,105.33

Finding the Fourth Proportional to 78,915.21, 108,901.20 and 43,105.33

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Solution

The fourth proportional to 78,915.21, 108,901.20 and 43,105.33 is: 59,484.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,915.21 : 108,901.20 = 43,105.33 : x
  2. Step 2: Convert to fraction form
    78,915.21/108,901.20 = 43,105.33/x
  3. Step 3: Cross multiply
    78,915.21x = 108,901.20 × 43,105.33
  4. Step 4: Simplify right side
    78,915.21x = 4,694,222,163.40
  5. Step 5: Solve for x
    x = 4,694,222,163.40/78,915.21
  6. Step 6: Final answer
    x = 59,484.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.