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Finding the Fourth Proportional to 120,073.44, 180,045.36 and 85,081.44

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Solution

The fourth proportional to 120,073.44, 180,045.36 and 85,081.44 is: 127,576.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,073.44 : 180,045.36 = 85,081.44 : x
  2. Step 2: Convert to fraction form
    120,073.44/180,045.36 = 85,081.44/x
  3. Step 3: Cross multiply
    120,073.44x = 180,045.36 × 85,081.44
  4. Step 4: Simplify right side
    120,073.44x = 15,318,518,494.12
  5. Step 5: Solve for x
    x = 15,318,518,494.12/120,073.44
  6. Step 6: Final answer
    x = 127,576.24

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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.