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Finding the Fourth Proportional to 143,207.40, 214,811.10 and 80,999.40

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Solution

The fourth proportional to 143,207.40, 214,811.10 and 80,999.40 is: 121,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,207.40 : 214,811.10 = 80,999.40 : x
  2. Step 2: Convert to fraction form
    143,207.40/214,811.10 = 80,999.40/x
  3. Step 3: Cross multiply
    143,207.40x = 214,811.10 × 80,999.40
  4. Step 4: Simplify right side
    143,207.40x = 17,399,570,213.34
  5. Step 5: Solve for x
    x = 17,399,570,213.34/143,207.40
  6. Step 6: Final answer
    x = 121,499.10

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Similar ratio
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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.