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Finding the Fourth Proportional to 72,187.80, 108,195.30 and 37,109.40

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Solution

The fourth proportional to 72,187.80, 108,195.30 and 37,109.40 is: 55,619.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,187.80 : 108,195.30 = 37,109.40 : x
  2. Step 2: Convert to fraction form
    72,187.80/108,195.30 = 37,109.40/x
  3. Step 3: Cross multiply
    72,187.80x = 108,195.30 × 37,109.40
  4. Step 4: Simplify right side
    72,187.80x = 4,015,062,665.82
  5. Step 5: Solve for x
    x = 4,015,062,665.82/72,187.80
  6. Step 6: Final answer
    x = 55,619.68

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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.