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Finding the Fourth Proportional to 143,272.80, 197,704.80 and 85,924.80

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Solution

The fourth proportional to 143,272.80, 197,704.80 and 85,924.80 is: 118,569.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,272.80 : 197,704.80 = 85,924.80 : x
  2. Step 2: Convert to fraction form
    143,272.80/197,704.80 = 85,924.80/x
  3. Step 3: Cross multiply
    143,272.80x = 197,704.80 × 85,924.80
  4. Step 4: Simplify right side
    143,272.80x = 16,987,745,399.04
  5. Step 5: Solve for x
    x = 16,987,745,399.04/143,272.80
  6. Step 6: Final answer
    x = 118,569.23

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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.