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Finding the Fourth Proportional to 135,859.72, 203,502.30 and 85,914.04

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Solution

The fourth proportional to 135,859.72, 203,502.30 and 85,914.04 is: 128,689.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,859.72 : 203,502.30 = 85,914.04 : x
  2. Step 2: Convert to fraction form
    135,859.72/203,502.30 = 85,914.04/x
  3. Step 3: Cross multiply
    135,859.72x = 203,502.30 × 85,914.04
  4. Step 4: Simplify right side
    135,859.72x = 17,483,704,742.29
  5. Step 5: Solve for x
    x = 17,483,704,742.29/135,859.72
  6. Step 6: Final answer
    x = 128,689.39

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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.