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Finding the Fourth Proportional to 72,361.28, 99,859.56 and 40,529.96

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Solution

The fourth proportional to 72,361.28, 99,859.56 and 40,529.96 is: 55,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,361.28 : 99,859.56 = 40,529.96 : x
  2. Step 2: Convert to fraction form
    72,361.28/99,859.56 = 40,529.96/x
  3. Step 3: Cross multiply
    72,361.28x = 99,859.56 × 40,529.96
  4. Step 4: Simplify right side
    72,361.28x = 4,047,303,972.42
  5. Step 5: Solve for x
    x = 4,047,303,972.42/72,361.28
  6. Step 6: Final answer
    x = 55,931.90

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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.