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Finding the Fourth Proportional to 71,454.88, 107,173.20 and 18,868.32

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Solution

The fourth proportional to 71,454.88, 107,173.20 and 18,868.32 is: 28,300.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,454.88 : 107,173.20 = 18,868.32 : x
  2. Step 2: Convert to fraction form
    71,454.88/107,173.20 = 18,868.32/x
  3. Step 3: Cross multiply
    71,454.88x = 107,173.20 × 18,868.32
  4. Step 4: Simplify right side
    71,454.88x = 2,022,178,233.02
  5. Step 5: Solve for x
    x = 2,022,178,233.02/71,454.88
  6. Step 6: Final answer
    x = 28,300.07

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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.