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Finding the Fourth Proportional to 217,455.84, 326,310.12 and 91,084.91

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Solution

The fourth proportional to 217,455.84, 326,310.12 and 91,084.91 is: 136,680.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,455.84 : 326,310.12 = 91,084.91 : x
  2. Step 2: Convert to fraction form
    217,455.84/326,310.12 = 91,084.91/x
  3. Step 3: Cross multiply
    217,455.84x = 326,310.12 × 91,084.91
  4. Step 4: Simplify right side
    217,455.84x = 29,721,926,280.74
  5. Step 5: Solve for x
    x = 29,721,926,280.74/217,455.84
  6. Step 6: Final answer
    x = 136,680.29

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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.