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Finding the Fourth Proportional to 206,999.80, 310,499.70 and 140,077.60

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Solution

The fourth proportional to 206,999.80, 310,499.70 and 140,077.60 is: 210,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,999.80 : 310,499.70 = 140,077.60 : x
  2. Step 2: Convert to fraction form
    206,999.80/310,499.70 = 140,077.60/x
  3. Step 3: Cross multiply
    206,999.80x = 310,499.70 × 140,077.60
  4. Step 4: Simplify right side
    206,999.80x = 43,494,052,776.72
  5. Step 5: Solve for x
    x = 43,494,052,776.72/206,999.80
  6. Step 6: Final answer
    x = 210,116.40

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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.