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Finding the Fourth Proportional to 78,392.66, 117,517.92 and 50,320.66

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Solution

The fourth proportional to 78,392.66, 117,517.92 and 50,320.66 is: 75,435.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,392.66 : 117,517.92 = 50,320.66 : x
  2. Step 2: Convert to fraction form
    78,392.66/117,517.92 = 50,320.66/x
  3. Step 3: Cross multiply
    78,392.66x = 117,517.92 × 50,320.66
  4. Step 4: Simplify right side
    78,392.66x = 5,913,579,296.23
  5. Step 5: Solve for x
    x = 5,913,579,296.23/78,392.66
  6. Step 6: Final answer
    x = 75,435.37

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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.