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Finding the Fourth Proportional to 217,490.40, 325,976.40 and 91,130.40

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Solution

The fourth proportional to 217,490.40, 325,976.40 and 91,130.40 is: 136,586.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,490.40 : 325,976.40 = 91,130.40 : x
  2. Step 2: Convert to fraction form
    217,490.40/325,976.40 = 91,130.40/x
  3. Step 3: Cross multiply
    217,490.40x = 325,976.40 × 91,130.40
  4. Step 4: Simplify right side
    217,490.40x = 29,706,359,722.56
  5. Step 5: Solve for x
    x = 29,706,359,722.56/217,490.40
  6. Step 6: Final answer
    x = 136,586.99

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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.