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Finding the Fourth Proportional to 85,590.88, 128,408.24 and 32,986.24

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Solution

The fourth proportional to 85,590.88, 128,408.24 and 32,986.24 is: 49,487.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,590.88 : 128,408.24 = 32,986.24 : x
  2. Step 2: Convert to fraction form
    85,590.88/128,408.24 = 32,986.24/x
  3. Step 3: Cross multiply
    85,590.88x = 128,408.24 × 32,986.24
  4. Step 4: Simplify right side
    85,590.88x = 4,235,705,022.62
  5. Step 5: Solve for x
    x = 4,235,705,022.62/85,590.88
  6. Step 6: Final answer
    x = 49,487.81

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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.