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Finding the Fourth Proportional to 85,763.86, 128,658.24 and 26,604.29

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Solution

The fourth proportional to 85,763.86, 128,658.24 and 26,604.29 is: 39,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,763.86 : 128,658.24 = 26,604.29 : x
  2. Step 2: Convert to fraction form
    85,763.86/128,658.24 = 26,604.29/x
  3. Step 3: Cross multiply
    85,763.86x = 128,658.24 × 26,604.29
  4. Step 4: Simplify right side
    85,763.86x = 3,422,861,449.50
  5. Step 5: Solve for x
    x = 3,422,861,449.50/85,763.86
  6. Step 6: Final answer
    x = 39,910.30

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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.