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Finding the Fourth Proportional to 85,760.97, 128,640.51 and 33,133.56

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Solution

The fourth proportional to 85,760.97, 128,640.51 and 33,133.56 is: 49,699.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,760.97 : 128,640.51 = 33,133.56 : x
  2. Step 2: Convert to fraction form
    85,760.97/128,640.51 = 33,133.56/x
  3. Step 3: Cross multiply
    85,760.97x = 128,640.51 × 33,133.56
  4. Step 4: Simplify right side
    85,760.97x = 4,262,318,056.52
  5. Step 5: Solve for x
    x = 4,262,318,056.52/85,760.97
  6. Step 6: Final answer
    x = 49,699.97

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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.