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Finding the Fourth Proportional to 256,087.40, 384,131.10 and 69,098.60

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Solution

The fourth proportional to 256,087.40, 384,131.10 and 69,098.60 is: 103,647.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,087.40 : 384,131.10 = 69,098.60 : x
  2. Step 2: Convert to fraction form
    256,087.40/384,131.10 = 69,098.60/x
  3. Step 3: Cross multiply
    256,087.40x = 384,131.10 × 69,098.60
  4. Step 4: Simplify right side
    256,087.40x = 26,542,921,226.46
  5. Step 5: Solve for x
    x = 26,542,921,226.46/256,087.40
  6. Step 6: Final answer
    x = 103,647.90

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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.