Home / 78,826.56-108,780.06-43,015.78

Finding the Fourth Proportional to 78,826.56, 108,780.06 and 43,015.78

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Solution

The fourth proportional to 78,826.56, 108,780.06 and 43,015.78 is: 59,361.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,826.56 : 108,780.06 = 43,015.78 : x
  2. Step 2: Convert to fraction form
    78,826.56/108,780.06 = 43,015.78/x
  3. Step 3: Cross multiply
    78,826.56x = 108,780.06 × 43,015.78
  4. Step 4: Simplify right side
    78,826.56x = 4,679,259,129.35
  5. Step 5: Solve for x
    x = 4,679,259,129.35/78,826.56
  6. Step 6: Final answer
    x = 59,361.45

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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.