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Finding the Fourth Proportional to 72,826.88, 109,266.44 and 28,485.45

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Solution

The fourth proportional to 72,826.88, 109,266.44 and 28,485.45 is: 42,738.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,826.88 : 109,266.44 = 28,485.45 : x
  2. Step 2: Convert to fraction form
    72,826.88/109,266.44 = 28,485.45/x
  3. Step 3: Cross multiply
    72,826.88x = 109,266.44 × 28,485.45
  4. Step 4: Simplify right side
    72,826.88x = 3,112,503,570.87
  5. Step 5: Solve for x
    x = 3,112,503,570.87/72,826.88
  6. Step 6: Final answer
    x = 42,738.39

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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.