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Finding the Fourth Proportional to 154,635, 213,396.30 and 87,579.96

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Solution

The fourth proportional to 154,635, 213,396.30 and 87,579.96 is: 120,860.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,635 : 213,396.30 = 87,579.96 : x
  2. Step 2: Convert to fraction form
    154,635/213,396.30 = 87,579.96/x
  3. Step 3: Cross multiply
    154,635x = 213,396.30 × 87,579.96
  4. Step 4: Simplify right side
    154,635x = 18,689,239,418.15
  5. Step 5: Solve for x
    x = 18,689,239,418.15/154,635
  6. Step 6: Final answer
    x = 120,860.34

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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.