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Finding the Fourth Proportional to 72,896.55, 109,354.08 and 28,517.61

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Solution

The fourth proportional to 72,896.55, 109,354.08 and 28,517.61 is: 42,780.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,896.55 : 109,354.08 = 28,517.61 : x
  2. Step 2: Convert to fraction form
    72,896.55/109,354.08 = 28,517.61/x
  3. Step 3: Cross multiply
    72,896.55x = 109,354.08 × 28,517.61
  4. Step 4: Simplify right side
    72,896.55x = 3,118,516,458.58
  5. Step 5: Solve for x
    x = 3,118,516,458.58/72,896.55
  6. Step 6: Final answer
    x = 42,780.03

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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.