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Finding the Fourth Proportional to 215,425.60, 323,138.40 and 136,628.80

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Solution

The fourth proportional to 215,425.60, 323,138.40 and 136,628.80 is: 204,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,425.60 : 323,138.40 = 136,628.80 : x
  2. Step 2: Convert to fraction form
    215,425.60/323,138.40 = 136,628.80/x
  3. Step 3: Cross multiply
    215,425.60x = 323,138.40 × 136,628.80
  4. Step 4: Simplify right side
    215,425.60x = 44,150,011,825.92
  5. Step 5: Solve for x
    x = 44,150,011,825.92/215,425.60
  6. Step 6: Final answer
    x = 204,943.20

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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.