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Finding the Fourth Proportional to 191,593.35, 287,168.29 and 90,455.54

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Solution

The fourth proportional to 191,593.35, 287,168.29 and 90,455.54 is: 135,578.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,593.35 : 287,168.29 = 90,455.54 : x
  2. Step 2: Convert to fraction form
    191,593.35/287,168.29 = 90,455.54/x
  3. Step 3: Cross multiply
    191,593.35x = 287,168.29 × 90,455.54
  4. Step 4: Simplify right side
    191,593.35x = 25,975,961,080.85
  5. Step 5: Solve for x
    x = 25,975,961,080.85/191,593.35
  6. Step 6: Final answer
    x = 135,578.62

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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.