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Finding the Fourth Proportional to 180,490.28, 270,729.68 and 85,788.59

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Solution

The fourth proportional to 180,490.28, 270,729.68 and 85,788.59 is: 128,680.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    180,490.28 : 270,729.68 = 85,788.59 : x
  2. Step 2: Convert to fraction form
    180,490.28/270,729.68 = 85,788.59/x
  3. Step 3: Cross multiply
    180,490.28x = 270,729.68 × 85,788.59
  4. Step 4: Simplify right side
    180,490.28x = 23,225,515,735.76
  5. Step 5: Solve for x
    x = 23,225,515,735.76/180,490.28
  6. Step 6: Final answer
    x = 128,680.15

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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.