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Finding the Fourth Proportional to 85,753.63, 128,674.36 and 40,825.82

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Solution

The fourth proportional to 85,753.63, 128,674.36 and 40,825.82 is: 61,259.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,753.63 : 128,674.36 = 40,825.82 : x
  2. Step 2: Convert to fraction form
    85,753.63/128,674.36 = 40,825.82/x
  3. Step 3: Cross multiply
    85,753.63x = 128,674.36 × 40,825.82
  4. Step 4: Simplify right side
    85,753.63x = 5,253,235,514.54
  5. Step 5: Solve for x
    x = 5,253,235,514.54/85,753.63
  6. Step 6: Final answer
    x = 61,259.63

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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.