Home / 256,116.20-384,231.90-78,631.40

Finding the Fourth Proportional to 256,116.20, 384,231.90 and 78,631.40

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Solution

The fourth proportional to 256,116.20, 384,231.90 and 78,631.40 is: 117,964.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,116.20 : 384,231.90 = 78,631.40 : x
  2. Step 2: Convert to fraction form
    256,116.20/384,231.90 = 78,631.40/x
  3. Step 3: Cross multiply
    256,116.20x = 384,231.90 × 78,631.40
  4. Step 4: Simplify right side
    256,116.20x = 30,212,692,221.66
  5. Step 5: Solve for x
    x = 30,212,692,221.66/256,116.20
  6. Step 6: Final answer
    x = 117,964.78

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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.