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Finding the Fourth Proportional to 253,652.20, 380,494.70 and 85,165.72

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Solution

The fourth proportional to 253,652.20, 380,494.70 and 85,165.72 is: 127,754.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,652.20 : 380,494.70 = 85,165.72 : x
  2. Step 2: Convert to fraction form
    253,652.20/380,494.70 = 85,165.72/x
  3. Step 3: Cross multiply
    253,652.20x = 380,494.70 × 85,165.72
  4. Step 4: Simplify right side
    253,652.20x = 32,405,105,081.68
  5. Step 5: Solve for x
    x = 32,405,105,081.68/253,652.20
  6. Step 6: Final answer
    x = 127,754.09

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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.