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Finding the Fourth Proportional to 85,297.50, 128,004.57 and 29,893.50

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Solution

The fourth proportional to 85,297.50, 128,004.57 and 29,893.50 is: 44,860.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,297.50 : 128,004.57 = 29,893.50 : x
  2. Step 2: Convert to fraction form
    85,297.50/128,004.57 = 29,893.50/x
  3. Step 3: Cross multiply
    85,297.50x = 128,004.57 × 29,893.50
  4. Step 4: Simplify right side
    85,297.50x = 3,826,504,613.30
  5. Step 5: Solve for x
    x = 3,826,504,613.30/85,297.50
  6. Step 6: Final answer
    x = 44,860.69

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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.