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Finding the Fourth Proportional to 72,169.02, 108,245.40 and 19,582.60

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Solution

The fourth proportional to 72,169.02, 108,245.40 and 19,582.60 is: 29,371.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.02 : 108,245.40 = 19,582.60 : x
  2. Step 2: Convert to fraction form
    72,169.02/108,245.40 = 19,582.60/x
  3. Step 3: Cross multiply
    72,169.02x = 108,245.40 × 19,582.60
  4. Step 4: Simplify right side
    72,169.02x = 2,119,726,370.04
  5. Step 5: Solve for x
    x = 2,119,726,370.04/72,169.02
  6. Step 6: Final answer
    x = 29,371.69

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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.