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Finding the Fourth Proportional to 85,755.11, 128,676.54 and 40,827.26

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Solution

The fourth proportional to 85,755.11, 128,676.54 and 40,827.26 is: 61,261.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,755.11 : 128,676.54 = 40,827.26 : x
  2. Step 2: Convert to fraction form
    85,755.11/128,676.54 = 40,827.26/x
  3. Step 3: Cross multiply
    85,755.11x = 128,676.54 × 40,827.26
  4. Step 4: Simplify right side
    85,755.11x = 5,253,510,554.48
  5. Step 5: Solve for x
    x = 5,253,510,554.48/85,755.11
  6. Step 6: Final answer
    x = 61,261.78

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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.