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Finding the Fourth Proportional to 72,539.46, 108,796.65 and 19,231.79

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Solution

The fourth proportional to 72,539.46, 108,796.65 and 19,231.79 is: 28,844.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539.46 : 108,796.65 = 19,231.79 : x
  2. Step 2: Convert to fraction form
    72,539.46/108,796.65 = 19,231.79/x
  3. Step 3: Cross multiply
    72,539.46x = 108,796.65 × 19,231.79
  4. Step 4: Simplify right side
    72,539.46x = 2,092,354,325.50
  5. Step 5: Solve for x
    x = 2,092,354,325.50/72,539.46
  6. Step 6: Final answer
    x = 28,844.36

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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.