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Finding the Fourth Proportional to 78,883.56, 108,863.74 and 43,076.90

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Solution

The fourth proportional to 78,883.56, 108,863.74 and 43,076.90 is: 59,448.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,883.56 : 108,863.74 = 43,076.90 : x
  2. Step 2: Convert to fraction form
    78,883.56/108,863.74 = 43,076.90/x
  3. Step 3: Cross multiply
    78,883.56x = 108,863.74 × 43,076.90
  4. Step 4: Simplify right side
    78,883.56x = 4,689,512,441.61
  5. Step 5: Solve for x
    x = 4,689,512,441.61/78,883.56
  6. Step 6: Final answer
    x = 59,448.54

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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.