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Finding the Fourth Proportional to 72,400.08, 108,606.60 and 19,809.84

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Solution

The fourth proportional to 72,400.08, 108,606.60 and 19,809.84 is: 29,716.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400.08 : 108,606.60 = 19,809.84 : x
  2. Step 2: Convert to fraction form
    72,400.08/108,606.60 = 19,809.84/x
  3. Step 3: Cross multiply
    72,400.08x = 108,606.60 × 19,809.84
  4. Step 4: Simplify right side
    72,400.08x = 2,151,479,368.94
  5. Step 5: Solve for x
    x = 2,151,479,368.94/72,400.08
  6. Step 6: Final answer
    x = 29,716.53

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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.