Home / 215,872.81-297,905.78-120,385.55

Finding the Fourth Proportional to 215,872.81, 297,905.78 and 120,385.55

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Solution

The fourth proportional to 215,872.81, 297,905.78 and 120,385.55 is: 166,132.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,872.81 : 297,905.78 = 120,385.55 : x
  2. Step 2: Convert to fraction form
    215,872.81/297,905.78 = 120,385.55/x
  3. Step 3: Cross multiply
    215,872.81x = 297,905.78 × 120,385.55
  4. Step 4: Simplify right side
    215,872.81x = 35,863,551,173.48
  5. Step 5: Solve for x
    x = 35,863,551,173.48/215,872.81
  6. Step 6: Final answer
    x = 166,132.79

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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.