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Finding the Fourth Proportional to 132,894.79, 199,342.19 and 91,215.43

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Solution

The fourth proportional to 132,894.79, 199,342.19 and 91,215.43 is: 136,823.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,894.79 : 199,342.19 = 91,215.43 : x
  2. Step 2: Convert to fraction form
    132,894.79/199,342.19 = 91,215.43/x
  3. Step 3: Cross multiply
    132,894.79x = 199,342.19 × 91,215.43
  4. Step 4: Simplify right side
    132,894.79x = 18,183,083,121.91
  5. Step 5: Solve for x
    x = 18,183,083,121.91/132,894.79
  6. Step 6: Final answer
    x = 136,823.15

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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.