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Finding the Fourth Proportional to 155,991.92, 215,268.08 and 84,372

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Solution

The fourth proportional to 155,991.92, 215,268.08 and 84,372 is: 116,432.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,991.92 : 215,268.08 = 84,372 : x
  2. Step 2: Convert to fraction form
    155,991.92/215,268.08 = 84,372/x
  3. Step 3: Cross multiply
    155,991.92x = 215,268.08 × 84,372
  4. Step 4: Simplify right side
    155,991.92x = 18,162,598,445.76
  5. Step 5: Solve for x
    x = 18,162,598,445.76/155,991.92
  6. Step 6: Final answer
    x = 116,432.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.