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Finding the Fourth Proportional to 72,273.72, 108,399.64 and 19,687.35

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Solution

The fourth proportional to 72,273.72, 108,399.64 and 19,687.35 is: 29,528.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,273.72 : 108,399.64 = 19,687.35 : x
  2. Step 2: Convert to fraction form
    72,273.72/108,399.64 = 19,687.35/x
  3. Step 3: Cross multiply
    72,273.72x = 108,399.64 × 19,687.35
  4. Step 4: Simplify right side
    72,273.72x = 2,134,101,652.55
  5. Step 5: Solve for x
    x = 2,134,101,652.55/72,273.72
  6. Step 6: Final answer
    x = 29,528.04

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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.