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Finding the Fourth Proportional to 215,606.88, 323,455.12 and 90,948.96

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Solution

The fourth proportional to 215,606.88, 323,455.12 and 90,948.96 is: 136,442.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,606.88 : 323,455.12 = 90,948.96 : x
  2. Step 2: Convert to fraction form
    215,606.88/323,455.12 = 90,948.96/x
  3. Step 3: Cross multiply
    215,606.88x = 323,455.12 × 90,948.96
  4. Step 4: Simplify right side
    215,606.88x = 29,417,906,770.68
  5. Step 5: Solve for x
    x = 29,417,906,770.68/215,606.88
  6. Step 6: Final answer
    x = 136,442.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.