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Finding the Fourth Proportional to 117,339.56, 161,916.60 and 72,019.44

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Solution

The fourth proportional to 117,339.56, 161,916.60 and 72,019.44 is: 99,379.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,339.56 : 161,916.60 = 72,019.44 : x
  2. Step 2: Convert to fraction form
    117,339.56/161,916.60 = 72,019.44/x
  3. Step 3: Cross multiply
    117,339.56x = 161,916.60 × 72,019.44
  4. Step 4: Simplify right side
    117,339.56x = 11,661,142,858.70
  5. Step 5: Solve for x
    x = 11,661,142,858.70/117,339.56
  6. Step 6: Final answer
    x = 99,379.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.