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Finding the Fourth Proportional to 85,311.68, 127,990.20 and 29,151.68

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Solution

The fourth proportional to 85,311.68, 127,990.20 and 29,151.68 is: 43,735.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,311.68 : 127,990.20 = 29,151.68 : x
  2. Step 2: Convert to fraction form
    85,311.68/127,990.20 = 29,151.68/x
  3. Step 3: Cross multiply
    85,311.68x = 127,990.20 × 29,151.68
  4. Step 4: Simplify right side
    85,311.68x = 3,731,129,353.54
  5. Step 5: Solve for x
    x = 3,731,129,353.54/85,311.68
  6. Step 6: Final answer
    x = 43,735.27

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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.