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Finding the Fourth Proportional to 72,355.28, 99,851.28 and 40,523.92

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Solution

The fourth proportional to 72,355.28, 99,851.28 and 40,523.92 is: 55,923.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,355.28 : 99,851.28 = 40,523.92 : x
  2. Step 2: Convert to fraction form
    72,355.28/99,851.28 = 40,523.92/x
  3. Step 3: Cross multiply
    72,355.28x = 99,851.28 × 40,523.92
  4. Step 4: Simplify right side
    72,355.28x = 4,046,365,282.62
  5. Step 5: Solve for x
    x = 4,046,365,282.62/72,355.28
  6. Step 6: Final answer
    x = 55,923.57

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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.