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Finding the Fourth Proportional to 78,477.83, 117,716.74 and 68,636.33

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Solution

The fourth proportional to 78,477.83, 117,716.74 and 68,636.33 is: 102,954.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,477.83 : 117,716.74 = 68,636.33 : x
  2. Step 2: Convert to fraction form
    78,477.83/117,716.74 = 68,636.33/x
  3. Step 3: Cross multiply
    78,477.83x = 117,716.74 × 68,636.33
  4. Step 4: Simplify right side
    78,477.83x = 8,079,644,252.99
  5. Step 5: Solve for x
    x = 8,079,644,252.99/78,477.83
  6. Step 6: Final answer
    x = 102,954.49

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1.5x scale

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.