Home / 78,738.89-108,659.59-42,928.89

Finding the Fourth Proportional to 78,738.89, 108,659.59 and 42,928.89

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Solution

The fourth proportional to 78,738.89, 108,659.59 and 42,928.89 is: 59,241.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,738.89 : 108,659.59 = 42,928.89 : x
  2. Step 2: Convert to fraction form
    78,738.89/108,659.59 = 42,928.89/x
  3. Step 3: Cross multiply
    78,738.89x = 108,659.59 × 42,928.89
  4. Step 4: Simplify right side
    78,738.89x = 4,664,635,586.56
  5. Step 5: Solve for x
    x = 4,664,635,586.56/78,738.89
  6. Step 6: Final answer
    x = 59,241.83

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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.