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Finding the Fourth Proportional to 235,411.05, 353,005.28 and 85,546.89

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Solution

The fourth proportional to 235,411.05, 353,005.28 and 85,546.89 is: 128,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,411.05 : 353,005.28 = 85,546.89 : x
  2. Step 2: Convert to fraction form
    235,411.05/353,005.28 = 85,546.89/x
  3. Step 3: Cross multiply
    235,411.05x = 353,005.28 × 85,546.89
  4. Step 4: Simplify right side
    235,411.05x = 30,198,503,429.84
  5. Step 5: Solve for x
    x = 30,198,503,429.84/235,411.05
  6. Step 6: Final answer
    x = 128,279.89

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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.