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Finding the Fourth Proportional to 78,559.26, 117,949.62 and 56,360.55

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Solution

The fourth proportional to 78,559.26, 117,949.62 and 56,360.55 is: 84,620.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,559.26 : 117,949.62 = 56,360.55 : x
  2. Step 2: Convert to fraction form
    78,559.26/117,949.62 = 56,360.55/x
  3. Step 3: Cross multiply
    78,559.26x = 117,949.62 × 56,360.55
  4. Step 4: Simplify right side
    78,559.26x = 6,647,705,455.49
  5. Step 5: Solve for x
    x = 6,647,705,455.49/78,559.26
  6. Step 6: Final answer
    x = 84,620.27

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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.