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Finding the Fourth Proportional to 83,440.64, 115,138.32 and 49,449.80

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Solution

The fourth proportional to 83,440.64, 115,138.32 and 49,449.80 is: 68,234.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,440.64 : 115,138.32 = 49,449.80 : x
  2. Step 2: Convert to fraction form
    83,440.64/115,138.32 = 49,449.80/x
  3. Step 3: Cross multiply
    83,440.64x = 115,138.32 × 49,449.80
  4. Step 4: Simplify right side
    83,440.64x = 5,693,566,896.34
  5. Step 5: Solve for x
    x = 5,693,566,896.34/83,440.64
  6. Step 6: Final answer
    x = 68,234.94

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1.5x scale

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.