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Finding the Fourth Proportional to 72,523.79, 100,081.23 and 40,256.53

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Solution

The fourth proportional to 72,523.79, 100,081.23 and 40,256.53 is: 55,553.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,523.79 : 100,081.23 = 40,256.53 : x
  2. Step 2: Convert to fraction form
    72,523.79/100,081.23 = 40,256.53/x
  3. Step 3: Cross multiply
    72,523.79x = 100,081.23 × 40,256.53
  4. Step 4: Simplify right side
    72,523.79x = 4,028,923,037.93
  5. Step 5: Solve for x
    x = 4,028,923,037.93/72,523.79
  6. Step 6: Final answer
    x = 55,553.12

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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.