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Finding the Fourth Proportional to 352,009.78, 528,009.27 and 85,770.70

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Solution

The fourth proportional to 352,009.78, 528,009.27 and 85,770.70 is: 128,654.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,009.78 : 528,009.27 = 85,770.70 : x
  2. Step 2: Convert to fraction form
    352,009.78/528,009.27 = 85,770.70/x
  3. Step 3: Cross multiply
    352,009.78x = 528,009.27 × 85,770.70
  4. Step 4: Simplify right side
    352,009.78x = 45,287,724,694.39
  5. Step 5: Solve for x
    x = 45,287,724,694.39/352,009.78
  6. Step 6: Final answer
    x = 128,654.73

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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.