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Finding the Fourth Proportional to 85,668.88, 128,517.09 and 29,495.18

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Solution

The fourth proportional to 85,668.88, 128,517.09 and 29,495.18 is: 44,247.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,668.88 : 128,517.09 = 29,495.18 : x
  2. Step 2: Convert to fraction form
    85,668.88/128,517.09 = 29,495.18/x
  3. Step 3: Cross multiply
    85,668.88x = 128,517.09 × 29,495.18
  4. Step 4: Simplify right side
    85,668.88x = 3,790,633,949.43
  5. Step 5: Solve for x
    x = 3,790,633,949.43/85,668.88
  6. Step 6: Final answer
    x = 44,247.50

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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.