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Finding the Fourth Proportional to 143,401.80, 215,102.70 and 137,958.60

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Solution

The fourth proportional to 143,401.80, 215,102.70 and 137,958.60 is: 206,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,401.80 : 215,102.70 = 137,958.60 : x
  2. Step 2: Convert to fraction form
    143,401.80/215,102.70 = 137,958.60/x
  3. Step 3: Cross multiply
    143,401.80x = 215,102.70 × 137,958.60
  4. Step 4: Simplify right side
    143,401.80x = 29,675,267,348.22
  5. Step 5: Solve for x
    x = 29,675,267,348.22/143,401.80
  6. Step 6: Final answer
    x = 206,937.90

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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.