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Finding the Fourth Proportional to 217,419.40, 325,869.90 and 91,059.40

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Solution

The fourth proportional to 217,419.40, 325,869.90 and 91,059.40 is: 136,480.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,419.40 : 325,869.90 = 91,059.40 : x
  2. Step 2: Convert to fraction form
    217,419.40/325,869.90 = 91,059.40/x
  3. Step 3: Cross multiply
    217,419.40x = 325,869.90 × 91,059.40
  4. Step 4: Simplify right side
    217,419.40x = 29,673,517,572.06
  5. Step 5: Solve for x
    x = 29,673,517,572.06/217,419.40
  6. Step 6: Final answer
    x = 136,480.54

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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.