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Finding the Fourth Proportional to 72,388.53, 108,518.56 and 27,378.41

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Solution

The fourth proportional to 72,388.53, 108,518.56 and 27,378.41 is: 41,043.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,388.53 : 108,518.56 = 27,378.41 : x
  2. Step 2: Convert to fraction form
    72,388.53/108,518.56 = 27,378.41/x
  3. Step 3: Cross multiply
    72,388.53x = 108,518.56 × 27,378.41
  4. Step 4: Simplify right side
    72,388.53x = 2,971,065,628.29
  5. Step 5: Solve for x
    x = 2,971,065,628.29/72,388.53
  6. Step 6: Final answer
    x = 41,043.32

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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.