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Finding the Fourth Proportional to 85,711.68, 128,601.36 and 26,551.97

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Solution

The fourth proportional to 85,711.68, 128,601.36 and 26,551.97 is: 39,838.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,711.68 : 128,601.36 = 26,551.97 : x
  2. Step 2: Convert to fraction form
    85,711.68/128,601.36 = 26,551.97/x
  3. Step 3: Cross multiply
    85,711.68x = 128,601.36 × 26,551.97
  4. Step 4: Simplify right side
    85,711.68x = 3,414,618,809.67
  5. Step 5: Solve for x
    x = 3,414,618,809.67/85,711.68
  6. Step 6: Final answer
    x = 39,838.43

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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.