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Finding the Fourth Proportional to 78,553.26, 117,940.62 and 56,354.54

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Solution

The fourth proportional to 78,553.26, 117,940.62 and 56,354.54 is: 84,611.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,553.26 : 117,940.62 = 56,354.54 : x
  2. Step 2: Convert to fraction form
    78,553.26/117,940.62 = 56,354.54/x
  3. Step 3: Cross multiply
    78,553.26x = 117,940.62 × 56,354.54
  4. Step 4: Simplify right side
    78,553.26x = 6,646,488,797.71
  5. Step 5: Solve for x
    x = 6,646,488,797.71/78,553.26
  6. Step 6: Final answer
    x = 84,611.24

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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.