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Finding the Fourth Proportional to 72,241.98, 99,709.49 and 43,956.78

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Solution

The fourth proportional to 72,241.98, 99,709.49 and 43,956.78 is: 60,669.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,241.98 : 99,709.49 = 43,956.78 : x
  2. Step 2: Convert to fraction form
    72,241.98/99,709.49 = 43,956.78/x
  3. Step 3: Cross multiply
    72,241.98x = 99,709.49 × 43,956.78
  4. Step 4: Simplify right side
    72,241.98x = 4,382,908,115.84
  5. Step 5: Solve for x
    x = 4,382,908,115.84/72,241.98
  6. Step 6: Final answer
    x = 60,669.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.