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Finding the Fourth Proportional to 256,130.60, 384,195.90 and 123,074.60

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Solution

The fourth proportional to 256,130.60, 384,195.90 and 123,074.60 is: 184,611.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,130.60 : 384,195.90 = 123,074.60 : x
  2. Step 2: Convert to fraction form
    256,130.60/384,195.90 = 123,074.60/x
  3. Step 3: Cross multiply
    256,130.60x = 384,195.90 × 123,074.60
  4. Step 4: Simplify right side
    256,130.60x = 47,284,756,714.14
  5. Step 5: Solve for x
    x = 47,284,756,714.14/256,130.60
  6. Step 6: Final answer
    x = 184,611.90

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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.