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Finding the Fourth Proportional to 217,675.55, 326,639.32 and 91,304.42

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Solution

The fourth proportional to 217,675.55, 326,639.32 and 91,304.42 is: 137,009.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,675.55 : 326,639.32 = 91,304.42 : x
  2. Step 2: Convert to fraction form
    217,675.55/326,639.32 = 91,304.42/x
  3. Step 3: Cross multiply
    217,675.55x = 326,639.32 × 91,304.42
  4. Step 4: Simplify right side
    217,675.55x = 29,823,611,800.34
  5. Step 5: Solve for x
    x = 29,823,611,800.34/217,675.55
  6. Step 6: Final answer
    x = 137,009.47

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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.