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Finding the Fourth Proportional to 180,137.34, 270,199.88 and 85,412.90

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Solution

The fourth proportional to 180,137.34, 270,199.88 and 85,412.90 is: 128,116.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,137.34 : 270,199.88 = 85,412.90 : x
  2. Step 2: Convert to fraction form
    180,137.34/270,199.88 = 85,412.90/x
  3. Step 3: Cross multiply
    180,137.34x = 270,199.88 × 85,412.90
  4. Step 4: Simplify right side
    180,137.34x = 23,078,555,330.45
  5. Step 5: Solve for x
    x = 23,078,555,330.45/180,137.34
  6. Step 6: Final answer
    x = 128,116.44

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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.