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Finding the Fourth Proportional to 120,344.40, 180,516.60 and 85,352.40

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Solution

The fourth proportional to 120,344.40, 180,516.60 and 85,352.40 is: 128,028.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,344.40 : 180,516.60 = 85,352.40 : x
  2. Step 2: Convert to fraction form
    120,344.40/180,516.60 = 85,352.40/x
  3. Step 3: Cross multiply
    120,344.40x = 180,516.60 × 85,352.40
  4. Step 4: Simplify right side
    120,344.40x = 15,407,525,049.84
  5. Step 5: Solve for x
    x = 15,407,525,049.84/120,344.40
  6. Step 6: Final answer
    x = 128,028.60

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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.