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Finding the Fourth Proportional to 217,221.60, 325,816.20 and 90,829.20

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Solution

The fourth proportional to 217,221.60, 325,816.20 and 90,829.20 is: 136,237.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,221.60 : 325,816.20 = 90,829.20 : x
  2. Step 2: Convert to fraction form
    217,221.60/325,816.20 = 90,829.20/x
  3. Step 3: Cross multiply
    217,221.60x = 325,816.20 × 90,829.20
  4. Step 4: Simplify right side
    217,221.60x = 29,593,624,793.04
  5. Step 5: Solve for x
    x = 29,593,624,793.04/217,221.60
  6. Step 6: Final answer
    x = 136,237.03

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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.