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Finding the Fourth Proportional to 120,091.67, 180,137.51 and 31,344.40

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Solution

The fourth proportional to 120,091.67, 180,137.51 and 31,344.40 is: 47,016.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,091.67 : 180,137.51 = 31,344.40 : x
  2. Step 2: Convert to fraction form
    120,091.67/180,137.51 = 31,344.40/x
  3. Step 3: Cross multiply
    120,091.67x = 180,137.51 × 31,344.40
  4. Step 4: Simplify right side
    120,091.67x = 5,646,302,011.72
  5. Step 5: Solve for x
    x = 5,646,302,011.72/120,091.67
  6. Step 6: Final answer
    x = 47,016.60

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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.