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Finding the Fourth Proportional to 256,112.20, 384,168.30 and 89,878.60

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Solution

The fourth proportional to 256,112.20, 384,168.30 and 89,878.60 is: 134,817.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,112.20 : 384,168.30 = 89,878.60 : x
  2. Step 2: Convert to fraction form
    256,112.20/384,168.30 = 89,878.60/x
  3. Step 3: Cross multiply
    256,112.20x = 384,168.30 × 89,878.60
  4. Step 4: Simplify right side
    256,112.20x = 34,528,508,968.38
  5. Step 5: Solve for x
    x = 34,528,508,968.38/256,112.20
  6. Step 6: Final answer
    x = 134,817.90

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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.