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Finding the Fourth Proportional to 85,659.09, 128,497.19 and 29,491.76

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Solution

The fourth proportional to 85,659.09, 128,497.19 and 29,491.76 is: 44,240.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,659.09 : 128,497.19 = 29,491.76 : x
  2. Step 2: Convert to fraction form
    85,659.09/128,497.19 = 29,491.76/x
  3. Step 3: Cross multiply
    85,659.09x = 128,497.19 × 29,491.76
  4. Step 4: Simplify right side
    85,659.09x = 3,789,608,461.94
  5. Step 5: Solve for x
    x = 3,789,608,461.94/85,659.09
  6. Step 6: Final answer
    x = 44,240.59

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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.