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Finding the Fourth Proportional to 103,912.57, 155,587.29 and 53,887.75

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Solution

The fourth proportional to 103,912.57, 155,587.29 and 53,887.75 is: 80,685.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,912.57 : 155,587.29 = 53,887.75 : x
  2. Step 2: Convert to fraction form
    103,912.57/155,587.29 = 53,887.75/x
  3. Step 3: Cross multiply
    103,912.57x = 155,587.29 × 53,887.75
  4. Step 4: Simplify right side
    103,912.57x = 8,384,248,986.70
  5. Step 5: Solve for x
    x = 8,384,248,986.70/103,912.57
  6. Step 6: Final answer
    x = 80,685.61

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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.