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Finding the Fourth Proportional to 72,458.28, 108,692.28 and 19,863.36

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Solution

The fourth proportional to 72,458.28, 108,692.28 and 19,863.36 is: 29,796.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,458.28 : 108,692.28 = 19,863.36 : x
  2. Step 2: Convert to fraction form
    72,458.28/108,692.28 = 19,863.36/x
  3. Step 3: Cross multiply
    72,458.28x = 108,692.28 × 19,863.36
  4. Step 4: Simplify right side
    72,458.28x = 2,158,993,886.86
  5. Step 5: Solve for x
    x = 2,158,993,886.86/72,458.28
  6. Step 6: Final answer
    x = 29,796.37

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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.