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Finding the Fourth Proportional to 426,166.54, 639,353.85 and 141,856.54

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Solution

The fourth proportional to 426,166.54, 639,353.85 and 141,856.54 is: 212,819.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,166.54 : 639,353.85 = 141,856.54 : x
  2. Step 2: Convert to fraction form
    426,166.54/639,353.85 = 141,856.54/x
  3. Step 3: Cross multiply
    426,166.54x = 639,353.85 × 141,856.54
  4. Step 4: Simplify right side
    426,166.54x = 90,696,524,996.68
  5. Step 5: Solve for x
    x = 90,696,524,996.68/426,166.54
  6. Step 6: Final answer
    x = 212,819.44

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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.