Home / 78,243.27-117,337.11-28,310.41

Finding the Fourth Proportional to 78,243.27, 117,337.11 and 28,310.41

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Solution

The fourth proportional to 78,243.27, 117,337.11 and 28,310.41 is: 42,455.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,243.27 : 117,337.11 = 28,310.41 : x
  2. Step 2: Convert to fraction form
    78,243.27/117,337.11 = 28,310.41/x
  3. Step 3: Cross multiply
    78,243.27x = 117,337.11 × 28,310.41
  4. Step 4: Simplify right side
    78,243.27x = 3,321,861,732.82
  5. Step 5: Solve for x
    x = 3,321,861,732.82/78,243.27
  6. Step 6: Final answer
    x = 42,455.56

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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.