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Finding the Fourth Proportional to 120,198.60, 180,492.30 and 87,150.60

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Solution

The fourth proportional to 120,198.60, 180,492.30 and 87,150.60 is: 130,866.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,198.60 : 180,492.30 = 87,150.60 : x
  2. Step 2: Convert to fraction form
    120,198.60/180,492.30 = 87,150.60/x
  3. Step 3: Cross multiply
    120,198.60x = 180,492.30 × 87,150.60
  4. Step 4: Simplify right side
    120,198.60x = 15,730,012,240.38
  5. Step 5: Solve for x
    x = 15,730,012,240.38/120,198.60
  6. Step 6: Final answer
    x = 130,866.85

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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.