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Finding the Fourth Proportional to 206,890.64, 310,336.20 and 66,670.16

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Solution

The fourth proportional to 206,890.64, 310,336.20 and 66,670.16 is: 100,005.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,890.64 : 310,336.20 = 66,670.16 : x
  2. Step 2: Convert to fraction form
    206,890.64/310,336.20 = 66,670.16/x
  3. Step 3: Cross multiply
    206,890.64x = 310,336.20 × 66,670.16
  4. Step 4: Simplify right side
    206,890.64x = 20,690,164,107.79
  5. Step 5: Solve for x
    x = 20,690,164,107.79/206,890.64
  6. Step 6: Final answer
    x = 100,005.32

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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.