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Finding the Fourth Proportional to 351,657.57, 527,486.37 and 85,416.29

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Solution

The fourth proportional to 351,657.57, 527,486.37 and 85,416.29 is: 128,124.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,657.57 : 527,486.37 = 85,416.29 : x
  2. Step 2: Convert to fraction form
    351,657.57/527,486.37 = 85,416.29/x
  3. Step 3: Cross multiply
    351,657.57x = 527,486.37 × 85,416.29
  4. Step 4: Simplify right side
    351,657.57x = 45,055,928,750.97
  5. Step 5: Solve for x
    x = 45,055,928,750.97/351,657.57
  6. Step 6: Final answer
    x = 128,124.44

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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.