Home / 78,640.23-117,991.53-28,723.58

Finding the Fourth Proportional to 78,640.23, 117,991.53 and 28,723.58

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Solution

The fourth proportional to 78,640.23, 117,991.53 and 28,723.58 is: 43,096.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,640.23 : 117,991.53 = 28,723.58 : x
  2. Step 2: Convert to fraction form
    78,640.23/117,991.53 = 28,723.58/x
  3. Step 3: Cross multiply
    78,640.23x = 117,991.53 × 28,723.58
  4. Step 4: Simplify right side
    78,640.23x = 3,389,139,151.28
  5. Step 5: Solve for x
    x = 3,389,139,151.28/78,640.23
  6. Step 6: Final answer
    x = 43,096.76

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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.