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Finding the Fourth Proportional to 212,725.80, 318,743.10 and 133,698.60

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Solution

The fourth proportional to 212,725.80, 318,743.10 and 133,698.60 is: 200,330.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,725.80 : 318,743.10 = 133,698.60 : x
  2. Step 2: Convert to fraction form
    212,725.80/318,743.10 = 133,698.60/x
  3. Step 3: Cross multiply
    212,725.80x = 318,743.10 × 133,698.60
  4. Step 4: Simplify right side
    212,725.80x = 42,615,506,229.66
  5. Step 5: Solve for x
    x = 42,615,506,229.66/212,725.80
  6. Step 6: Final answer
    x = 200,330.69

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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.