Home / 261,131.20-391,243.20-120,601.60

Finding the Fourth Proportional to 261,131.20, 391,243.20 and 120,601.60

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Solution

The fourth proportional to 261,131.20, 391,243.20 and 120,601.60 is: 180,692.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,131.20 : 391,243.20 = 120,601.60 : x
  2. Step 2: Convert to fraction form
    261,131.20/391,243.20 = 120,601.60/x
  3. Step 3: Cross multiply
    261,131.20x = 391,243.20 × 120,601.60
  4. Step 4: Simplify right side
    261,131.20x = 47,184,555,909.12
  5. Step 5: Solve for x
    x = 47,184,555,909.12/261,131.20
  6. Step 6: Final answer
    x = 180,692.91

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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.