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Finding the Fourth Proportional to 154,396, 213,072.24 and 87,326.56

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Solution

The fourth proportional to 154,396, 213,072.24 and 87,326.56 is: 120,513.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,396 : 213,072.24 = 87,326.56 : x
  2. Step 2: Convert to fraction form
    154,396/213,072.24 = 87,326.56/x
  3. Step 3: Cross multiply
    154,396x = 213,072.24 × 87,326.56
  4. Step 4: Simplify right side
    154,396x = 18,606,865,750.69
  5. Step 5: Solve for x
    x = 18,606,865,750.69/154,396
  6. Step 6: Final answer
    x = 120,513.91

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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.