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Finding the Fourth Proportional to 78,093, 117,068.22 and 28,132.20

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Solution

The fourth proportional to 78,093, 117,068.22 and 28,132.20 is: 42,172.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,093 : 117,068.22 = 28,132.20 : x
  2. Step 2: Convert to fraction form
    78,093/117,068.22 = 28,132.20/x
  3. Step 3: Cross multiply
    78,093x = 117,068.22 × 28,132.20
  4. Step 4: Simplify right side
    78,093x = 3,293,386,578.68
  5. Step 5: Solve for x
    x = 3,293,386,578.68/78,093
  6. Step 6: Final answer
    x = 42,172.62

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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.