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Finding the Fourth Proportional to 154,572.75, 213,310.40 and 87,504.75

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Solution

The fourth proportional to 154,572.75, 213,310.40 and 87,504.75 is: 120,756.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,572.75 : 213,310.40 = 87,504.75 : x
  2. Step 2: Convert to fraction form
    154,572.75/213,310.40 = 87,504.75/x
  3. Step 3: Cross multiply
    154,572.75x = 213,310.40 × 87,504.75
  4. Step 4: Simplify right side
    154,572.75x = 18,665,672,786.88
  5. Step 5: Solve for x
    x = 18,665,672,786.88/154,572.75
  6. Step 6: Final answer
    x = 120,756.56

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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.