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Finding the Fourth Proportional to 85,511.88, 128,295.72 and 41,142.24

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Solution

The fourth proportional to 85,511.88, 128,295.72 and 41,142.24 is: 61,726.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,511.88 : 128,295.72 = 41,142.24 : x
  2. Step 2: Convert to fraction form
    85,511.88/128,295.72 = 41,142.24/x
  3. Step 3: Cross multiply
    85,511.88x = 128,295.72 × 41,142.24
  4. Step 4: Simplify right side
    85,511.88x = 5,278,373,303.21
  5. Step 5: Solve for x
    x = 5,278,373,303.21/85,511.88
  6. Step 6: Final answer
    x = 61,726.78

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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.