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Finding the Fourth Proportional to 217,684.64, 326,619.90 and 91,356.23

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Solution

The fourth proportional to 217,684.64, 326,619.90 and 91,356.23 is: 137,073.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,684.64 : 326,619.90 = 91,356.23 : x
  2. Step 2: Convert to fraction form
    217,684.64/326,619.90 = 91,356.23/x
  3. Step 3: Cross multiply
    217,684.64x = 326,619.90 × 91,356.23
  4. Step 4: Simplify right side
    217,684.64x = 29,838,761,073.88
  5. Step 5: Solve for x
    x = 29,838,761,073.88/217,684.64
  6. Step 6: Final answer
    x = 137,073.34

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1.5x scale

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.