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Finding the Fourth Proportional to 72,494.48, 108,684.12 and 28,119.44

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Solution

The fourth proportional to 72,494.48, 108,684.12 and 28,119.44 is: 42,156.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,494.48 : 108,684.12 = 28,119.44 : x
  2. Step 2: Convert to fraction form
    72,494.48/108,684.12 = 28,119.44/x
  3. Step 3: Cross multiply
    72,494.48x = 108,684.12 × 28,119.44
  4. Step 4: Simplify right side
    72,494.48x = 3,056,136,591.29
  5. Step 5: Solve for x
    x = 3,056,136,591.29/72,494.48
  6. Step 6: Final answer
    x = 42,156.82

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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.