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Finding the Fourth Proportional to 72,495.90, 108,734.94 and 28,092.78

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Solution

The fourth proportional to 72,495.90, 108,734.94 and 28,092.78 is: 42,135.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,495.90 : 108,734.94 = 28,092.78 : x
  2. Step 2: Convert to fraction form
    72,495.90/108,734.94 = 28,092.78/x
  3. Step 3: Cross multiply
    72,495.90x = 108,734.94 × 28,092.78
  4. Step 4: Simplify right side
    72,495.90x = 3,054,666,747.73
  5. Step 5: Solve for x
    x = 3,054,666,747.73/72,495.90
  6. Step 6: Final answer
    x = 42,135.72

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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.