Home / 256,186.20-384,336.90-78,701.40

Finding the Fourth Proportional to 256,186.20, 384,336.90 and 78,701.40

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Solution

The fourth proportional to 256,186.20, 384,336.90 and 78,701.40 is: 118,069.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,186.20 : 384,336.90 = 78,701.40 : x
  2. Step 2: Convert to fraction form
    256,186.20/384,336.90 = 78,701.40/x
  3. Step 3: Cross multiply
    256,186.20x = 384,336.90 × 78,701.40
  4. Step 4: Simplify right side
    256,186.20x = 30,247,852,101.66
  5. Step 5: Solve for x
    x = 30,247,852,101.66/256,186.20
  6. Step 6: Final answer
    x = 118,069.79

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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.