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Finding the Fourth Proportional to 120,442.72, 180,630.96 and 50,310.40

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Solution

The fourth proportional to 120,442.72, 180,630.96 and 50,310.40 is: 75,451.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,442.72 : 180,630.96 = 50,310.40 : x
  2. Step 2: Convert to fraction form
    120,442.72/180,630.96 = 50,310.40/x
  3. Step 3: Cross multiply
    120,442.72x = 180,630.96 × 50,310.40
  4. Step 4: Simplify right side
    120,442.72x = 9,087,615,849.98
  5. Step 5: Solve for x
    x = 9,087,615,849.98/120,442.72
  6. Step 6: Final answer
    x = 75,451.77

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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.