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Finding the Fourth Proportional to 154,654.56, 213,419.64 and 90,996.48

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Solution

The fourth proportional to 154,654.56, 213,419.64 and 90,996.48 is: 125,572.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,654.56 : 213,419.64 = 90,996.48 : x
  2. Step 2: Convert to fraction form
    154,654.56/213,419.64 = 90,996.48/x
  3. Step 3: Cross multiply
    154,654.56x = 213,419.64 × 90,996.48
  4. Step 4: Simplify right side
    154,654.56x = 19,420,436,002.87
  5. Step 5: Solve for x
    x = 19,420,436,002.87/154,654.56
  6. Step 6: Final answer
    x = 125,572.99

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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.