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Finding the Fourth Proportional to 76,861.91, 115,255.95 and 43,573.04

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Solution

The fourth proportional to 76,861.91, 115,255.95 and 43,573.04 is: 65,338.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,861.91 : 115,255.95 = 43,573.04 : x
  2. Step 2: Convert to fraction form
    76,861.91/115,255.95 = 43,573.04/x
  3. Step 3: Cross multiply
    76,861.91x = 115,255.95 × 43,573.04
  4. Step 4: Simplify right side
    76,861.91x = 5,022,051,812.12
  5. Step 5: Solve for x
    x = 5,022,051,812.12/76,861.91
  6. Step 6: Final answer
    x = 65,338.63

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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.