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Finding the Fourth Proportional to 154,415.70, 213,092.64 and 86,438.88

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Solution

The fourth proportional to 154,415.70, 213,092.64 and 86,438.88 is: 119,285.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,415.70 : 213,092.64 = 86,438.88 : x
  2. Step 2: Convert to fraction form
    154,415.70/213,092.64 = 86,438.88/x
  3. Step 3: Cross multiply
    154,415.70x = 213,092.64 × 86,438.88
  4. Step 4: Simplify right side
    154,415.70x = 18,419,489,137.84
  5. Step 5: Solve for x
    x = 18,419,489,137.84/154,415.70
  6. Step 6: Final answer
    x = 119,285.08

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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.