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Finding the Fourth Proportional to 256,085.60, 384,115.60 and 131,439.20

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Solution

The fourth proportional to 256,085.60, 384,115.60 and 131,439.20 is: 197,152.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,085.60 : 384,115.60 = 131,439.20 : x
  2. Step 2: Convert to fraction form
    256,085.60/384,115.60 = 131,439.20/x
  3. Step 3: Cross multiply
    256,085.60x = 384,115.60 × 131,439.20
  4. Step 4: Simplify right side
    256,085.60x = 50,487,847,171.52
  5. Step 5: Solve for x
    x = 50,487,847,171.52/256,085.60
  6. Step 6: Final answer
    x = 197,152.23

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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.