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Finding the Fourth Proportional to 206,672.80, 310,009.20 and 66,445.60

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Solution

The fourth proportional to 206,672.80, 310,009.20 and 66,445.60 is: 99,668.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,672.80 : 310,009.20 = 66,445.60 : x
  2. Step 2: Convert to fraction form
    206,672.80/310,009.20 = 66,445.60/x
  3. Step 3: Cross multiply
    206,672.80x = 310,009.20 × 66,445.60
  4. Step 4: Simplify right side
    206,672.80x = 20,598,747,299.52
  5. Step 5: Solve for x
    x = 20,598,747,299.52/206,672.80
  6. Step 6: Final answer
    x = 99,668.40

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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.