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Finding the Fourth Proportional to 72,588.79, 100,169.94 and 40,759.03

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Solution

The fourth proportional to 72,588.79, 100,169.94 and 40,759.03 is: 56,246.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,588.79 : 100,169.94 = 40,759.03 : x
  2. Step 2: Convert to fraction form
    72,588.79/100,169.94 = 40,759.03/x
  3. Step 3: Cross multiply
    72,588.79x = 100,169.94 × 40,759.03
  4. Step 4: Simplify right side
    72,588.79x = 4,082,829,589.56
  5. Step 5: Solve for x
    x = 4,082,829,589.56/72,588.79
  6. Step 6: Final answer
    x = 56,246.01

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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.