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Finding the Fourth Proportional to 72,945.44, 109,521.84 and 69,604.64

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Solution

The fourth proportional to 72,945.44, 109,521.84 and 69,604.64 is: 104,505.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.44 : 109,521.84 = 69,604.64 : x
  2. Step 2: Convert to fraction form
    72,945.44/109,521.84 = 69,604.64/x
  3. Step 3: Cross multiply
    72,945.44x = 109,521.84 × 69,604.64
  4. Step 4: Simplify right side
    72,945.44x = 7,623,228,245.34
  5. Step 5: Solve for x
    x = 7,623,228,245.34/72,945.44
  6. Step 6: Final answer
    x = 104,505.89

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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.