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Finding the Fourth Proportional to 85,453.59, 128,180.70 and 26,288.85

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Solution

The fourth proportional to 85,453.59, 128,180.70 and 26,288.85 is: 39,433.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,453.59 : 128,180.70 = 26,288.85 : x
  2. Step 2: Convert to fraction form
    85,453.59/128,180.70 = 26,288.85/x
  3. Step 3: Cross multiply
    85,453.59x = 128,180.70 × 26,288.85
  4. Step 4: Simplify right side
    85,453.59x = 3,369,723,195.20
  5. Step 5: Solve for x
    x = 3,369,723,195.20/85,453.59
  6. Step 6: Final answer
    x = 39,433.37

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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.