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Finding the Fourth Proportional to 85,836.38, 128,754.54 and 26,672.09

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Solution

The fourth proportional to 85,836.38, 128,754.54 and 26,672.09 is: 40,008.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,836.38 : 128,754.54 = 26,672.09 : x
  2. Step 2: Convert to fraction form
    85,836.38/128,754.54 = 26,672.09/x
  3. Step 3: Cross multiply
    85,836.38x = 128,754.54 × 26,672.09
  4. Step 4: Simplify right side
    85,836.38x = 3,434,152,035.02
  5. Step 5: Solve for x
    x = 3,434,152,035.02/85,836.38
  6. Step 6: Final answer
    x = 40,008.12

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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.