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Finding the Fourth Proportional to 78,329.62, 117,511.71 and 25,736.86

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Solution

The fourth proportional to 78,329.62, 117,511.71 and 25,736.86 is: 38,610.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,329.62 : 117,511.71 = 25,736.86 : x
  2. Step 2: Convert to fraction form
    78,329.62/117,511.71 = 25,736.86/x
  3. Step 3: Cross multiply
    78,329.62x = 117,511.71 × 25,736.86
  4. Step 4: Simplify right side
    78,329.62x = 3,024,382,428.63
  5. Step 5: Solve for x
    x = 3,024,382,428.63/78,329.62
  6. Step 6: Final answer
    x = 38,610.97

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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.