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Finding the Fourth Proportional to 76,969.60, 115,540.80 and 59,516.80

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Solution

The fourth proportional to 76,969.60, 115,540.80 and 59,516.80 is: 89,342.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,969.60 : 115,540.80 = 59,516.80 : x
  2. Step 2: Convert to fraction form
    76,969.60/115,540.80 = 59,516.80/x
  3. Step 3: Cross multiply
    76,969.60x = 115,540.80 × 59,516.80
  4. Step 4: Simplify right side
    76,969.60x = 6,876,618,685.44
  5. Step 5: Solve for x
    x = 6,876,618,685.44/76,969.60
  6. Step 6: Final answer
    x = 89,342.01

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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.