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Finding the Fourth Proportional to 85,956.30, 128,936.26 and 26,792.48

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Solution

The fourth proportional to 85,956.30, 128,936.26 and 26,792.48 is: 40,189.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,956.30 : 128,936.26 = 26,792.48 : x
  2. Step 2: Convert to fraction form
    85,956.30/128,936.26 = 26,792.48/x
  3. Step 3: Cross multiply
    85,956.30x = 128,936.26 × 26,792.48
  4. Step 4: Simplify right side
    85,956.30x = 3,454,522,167.32
  5. Step 5: Solve for x
    x = 3,454,522,167.32/85,956.30
  6. Step 6: Final answer
    x = 40,189.28

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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.