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Finding the Fourth Proportional to 154,927, 213,799.26 and 87,859

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Solution

The fourth proportional to 154,927, 213,799.26 and 87,859 is: 121,245.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,927 : 213,799.26 = 87,859 : x
  2. Step 2: Convert to fraction form
    154,927/213,799.26 = 87,859/x
  3. Step 3: Cross multiply
    154,927x = 213,799.26 × 87,859
  4. Step 4: Simplify right side
    154,927x = 18,784,189,184.34
  5. Step 5: Solve for x
    x = 18,784,189,184.34/154,927
  6. Step 6: Final answer
    x = 121,245.42

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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.