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Finding the Fourth Proportional to 217,135.60, 325,687.20 and 90,743.20

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Solution

The fourth proportional to 217,135.60, 325,687.20 and 90,743.20 is: 136,108.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,135.60 : 325,687.20 = 90,743.20 : x
  2. Step 2: Convert to fraction form
    217,135.60/325,687.20 = 90,743.20/x
  3. Step 3: Cross multiply
    217,135.60x = 325,687.20 × 90,743.20
  4. Step 4: Simplify right side
    217,135.60x = 29,553,898,727.04
  5. Step 5: Solve for x
    x = 29,553,898,727.04/217,135.60
  6. Step 6: Final answer
    x = 136,108.03

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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.