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Finding the Fourth Proportional to 85,995, 129,025.31 and 33,408.59

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Solution

The fourth proportional to 85,995, 129,025.31 and 33,408.59 is: 50,125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,995 : 129,025.31 = 33,408.59 : x
  2. Step 2: Convert to fraction form
    85,995/129,025.31 = 33,408.59/x
  3. Step 3: Cross multiply
    85,995x = 129,025.31 × 33,408.59
  4. Step 4: Simplify right side
    85,995x = 4,310,552,869.24
  5. Step 5: Solve for x
    x = 4,310,552,869.24/85,995
  6. Step 6: Final answer
    x = 50,125.62

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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.