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Finding the Fourth Proportional to 217,039.60, 325,559.40 and 76,812.40

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Solution

The fourth proportional to 217,039.60, 325,559.40 and 76,812.40 is: 115,218.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,039.60 : 325,559.40 = 76,812.40 : x
  2. Step 2: Convert to fraction form
    217,039.60/325,559.40 = 76,812.40/x
  3. Step 3: Cross multiply
    217,039.60x = 325,559.40 × 76,812.40
  4. Step 4: Simplify right side
    217,039.60x = 25,006,998,856.56
  5. Step 5: Solve for x
    x = 25,006,998,856.56/217,039.60
  6. Step 6: Final answer
    x = 115,218.60

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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.