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Finding the Fourth Proportional to 120,005.60, 179,619.60 and 85,013.60

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Solution

The fourth proportional to 120,005.60, 179,619.60 and 85,013.60 is: 127,244.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,005.60 : 179,619.60 = 85,013.60 : x
  2. Step 2: Convert to fraction form
    120,005.60/179,619.60 = 85,013.60/x
  3. Step 3: Cross multiply
    120,005.60x = 179,619.60 × 85,013.60
  4. Step 4: Simplify right side
    120,005.60x = 15,270,108,826.56
  5. Step 5: Solve for x
    x = 15,270,108,826.56/120,005.60
  6. Step 6: Final answer
    x = 127,244.97

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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.