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Finding the Fourth Proportional to 72,569.66, 108,826.56 and 28,190.54

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Solution

The fourth proportional to 72,569.66, 108,826.56 and 28,190.54 is: 42,274.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,569.66 : 108,826.56 = 28,190.54 : x
  2. Step 2: Convert to fraction form
    72,569.66/108,826.56 = 28,190.54/x
  3. Step 3: Cross multiply
    72,569.66x = 108,826.56 × 28,190.54
  4. Step 4: Simplify right side
    72,569.66x = 3,067,879,492.74
  5. Step 5: Solve for x
    x = 3,067,879,492.74/72,569.66
  6. Step 6: Final answer
    x = 42,274.96

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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.