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Finding the Fourth Proportional to 206,838.78, 310,085.92 and 80,449.32

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Solution

The fourth proportional to 206,838.78, 310,085.92 and 80,449.32 is: 120,606.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,838.78 : 310,085.92 = 80,449.32 : x
  2. Step 2: Convert to fraction form
    206,838.78/310,085.92 = 80,449.32/x
  3. Step 3: Cross multiply
    206,838.78x = 310,085.92 × 80,449.32
  4. Step 4: Simplify right side
    206,838.78x = 24,946,201,405.57
  5. Step 5: Solve for x
    x = 24,946,201,405.57/206,838.78
  6. Step 6: Final answer
    x = 120,606.98

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1.5x scale

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.