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Finding the Fourth Proportional to 217,616.40, 326,165.40 and 91,256.40

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Solution

The fourth proportional to 217,616.40, 326,165.40 and 91,256.40 is: 136,775.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,616.40 : 326,165.40 = 91,256.40 : x
  2. Step 2: Convert to fraction form
    217,616.40/326,165.40 = 91,256.40/x
  3. Step 3: Cross multiply
    217,616.40x = 326,165.40 × 91,256.40
  4. Step 4: Simplify right side
    217,616.40x = 29,764,680,208.56
  5. Step 5: Solve for x
    x = 29,764,680,208.56/217,616.40
  6. Step 6: Final answer
    x = 136,775.91

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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.