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Finding the Fourth Proportional to 78,600.36, 117,860.49 and 38,622

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Solution

The fourth proportional to 78,600.36, 117,860.49 and 38,622 is: 57,913.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,600.36 : 117,860.49 = 38,622 : x
  2. Step 2: Convert to fraction form
    78,600.36/117,860.49 = 38,622/x
  3. Step 3: Cross multiply
    78,600.36x = 117,860.49 × 38,622
  4. Step 4: Simplify right side
    78,600.36x = 4,552,007,844.78
  5. Step 5: Solve for x
    x = 4,552,007,844.78/78,600.36
  6. Step 6: Final answer
    x = 57,913.32

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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.