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Finding the Fourth Proportional to 76,665.60, 115,084.80 and 59,212.80

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Solution

The fourth proportional to 76,665.60, 115,084.80 and 59,212.80 is: 88,885.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,665.60 : 115,084.80 = 59,212.80 : x
  2. Step 2: Convert to fraction form
    76,665.60/115,084.80 = 59,212.80/x
  3. Step 3: Cross multiply
    76,665.60x = 115,084.80 × 59,212.80
  4. Step 4: Simplify right side
    76,665.60x = 6,814,493,245.44
  5. Step 5: Solve for x
    x = 6,814,493,245.44/76,665.60
  6. Step 6: Final answer
    x = 88,885.93

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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.