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Finding the Fourth Proportional to 217,092.60, 325,638.90 and 128,446.20

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Solution

The fourth proportional to 217,092.60, 325,638.90 and 128,446.20 is: 192,669.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,092.60 : 325,638.90 = 128,446.20 : x
  2. Step 2: Convert to fraction form
    217,092.60/325,638.90 = 128,446.20/x
  3. Step 3: Cross multiply
    217,092.60x = 325,638.90 × 128,446.20
  4. Step 4: Simplify right side
    217,092.60x = 41,827,079,277.18
  5. Step 5: Solve for x
    x = 41,827,079,277.18/217,092.60
  6. Step 6: Final answer
    x = 192,669.30

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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.