Home / 215,619.53-297,555.26-120,129.57

Finding the Fourth Proportional to 215,619.53, 297,555.26 and 120,129.57

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Solution

The fourth proportional to 215,619.53, 297,555.26 and 120,129.57 is: 165,778.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,619.53 : 297,555.26 = 120,129.57 : x
  2. Step 2: Convert to fraction form
    215,619.53/297,555.26 = 120,129.57/x
  3. Step 3: Cross multiply
    215,619.53x = 297,555.26 × 120,129.57
  4. Step 4: Simplify right side
    215,619.53x = 35,745,184,834.39
  5. Step 5: Solve for x
    x = 35,745,184,834.39/215,619.53
  6. Step 6: Final answer
    x = 165,778.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.