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Finding the Fourth Proportional to 217,497.40, 325,986.90 and 91,137.40

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Solution

The fourth proportional to 217,497.40, 325,986.90 and 91,137.40 is: 136,597.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,497.40 : 325,986.90 = 91,137.40 : x
  2. Step 2: Convert to fraction form
    217,497.40/325,986.90 = 91,137.40/x
  3. Step 3: Cross multiply
    217,497.40x = 325,986.90 × 91,137.40
  4. Step 4: Simplify right side
    217,497.40x = 29,709,598,500.06
  5. Step 5: Solve for x
    x = 29,709,598,500.06/217,497.40
  6. Step 6: Final answer
    x = 136,597.49

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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.