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Finding the Fourth Proportional to 103,659.81, 155,361.69 and 53,711.16

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Solution

The fourth proportional to 103,659.81, 155,361.69 and 53,711.16 is: 80,500.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,659.81 : 155,361.69 = 53,711.16 : x
  2. Step 2: Convert to fraction form
    103,659.81/155,361.69 = 53,711.16/x
  3. Step 3: Cross multiply
    103,659.81x = 155,361.69 × 53,711.16
  4. Step 4: Simplify right side
    103,659.81x = 8,344,656,589.46
  5. Step 5: Solve for x
    x = 8,344,656,589.46/103,659.81
  6. Step 6: Final answer
    x = 80,500.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.