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Finding the Fourth Proportional to 72,466.80, 108,687.64 and 19,159.24

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Solution

The fourth proportional to 72,466.80, 108,687.64 and 19,159.24 is: 28,735.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,466.80 : 108,687.64 = 19,159.24 : x
  2. Step 2: Convert to fraction form
    72,466.80/108,687.64 = 19,159.24/x
  3. Step 3: Cross multiply
    72,466.80x = 108,687.64 × 19,159.24
  4. Step 4: Simplify right side
    72,466.80x = 2,082,372,579.79
  5. Step 5: Solve for x
    x = 2,082,372,579.79/72,466.80
  6. Step 6: Final answer
    x = 28,735.54

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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.