Home / 120,119,191.10-180,192,958.43-90,018,372.86

Finding the Fourth Proportional to 120,119,191.10, 180,192,958.43 and 90,018,372.86

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Solution

The fourth proportional to 120,119,191.10, 180,192,958.43 and 90,018,372.86 is: 135,038,179.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,119,191.10 : 180,192,958.43 = 90,018,372.86 : x
  2. Step 2: Convert to fraction form
    120,119,191.10/180,192,958.43 = 90,018,372.86/x
  3. Step 3: Cross multiply
    120,119,191.10x = 180,192,958.43 × 90,018,372.86
  4. Step 4: Simplify right side
    120,119,191.10x = 16,220,676,918,698,220
  5. Step 5: Solve for x
    x = 16,220,676,918,698,220/120,119,191.10
  6. Step 6: Final answer
    x = 135,038,179.75

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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.