Home / 140,002.20-210,003.30-90,138.60

Finding the Fourth Proportional to 140,002.20, 210,003.30 and 90,138.60

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Solution

The fourth proportional to 140,002.20, 210,003.30 and 90,138.60 is: 135,207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,002.20 : 210,003.30 = 90,138.60 : x
  2. Step 2: Convert to fraction form
    140,002.20/210,003.30 = 90,138.60/x
  3. Step 3: Cross multiply
    140,002.20x = 210,003.30 × 90,138.60
  4. Step 4: Simplify right side
    140,002.20x = 18,929,403,457.38
  5. Step 5: Solve for x
    x = 18,929,403,457.38/140,002.20
  6. Step 6: Final answer
    x = 135,207.90

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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.