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Finding the Fourth Proportional to 72,542.96, 108,801.90 and 19,235.28

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Solution

The fourth proportional to 72,542.96, 108,801.90 and 19,235.28 is: 28,849.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,542.96 : 108,801.90 = 19,235.28 : x
  2. Step 2: Convert to fraction form
    72,542.96/108,801.90 = 19,235.28/x
  3. Step 3: Cross multiply
    72,542.96x = 108,801.90 × 19,235.28
  4. Step 4: Simplify right side
    72,542.96x = 2,092,835,011.03
  5. Step 5: Solve for x
    x = 2,092,835,011.03/72,542.96
  6. Step 6: Final answer
    x = 28,849.59

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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.