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Finding the Fourth Proportional to 155,992.56, 215,269.74 and 84,372.58

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Solution

The fourth proportional to 155,992.56, 215,269.74 and 84,372.58 is: 116,434.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,992.56 : 215,269.74 = 84,372.58 : x
  2. Step 2: Convert to fraction form
    155,992.56/215,269.74 = 84,372.58/x
  3. Step 3: Cross multiply
    155,992.56x = 215,269.74 × 84,372.58
  4. Step 4: Simplify right side
    155,992.56x = 18,162,863,359.73
  5. Step 5: Solve for x
    x = 18,162,863,359.73/155,992.56
  6. Step 6: Final answer
    x = 116,434.17

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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.