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Finding the Fourth Proportional to 215,925.96, 297,978.24 and 120,438.84

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Solution

The fourth proportional to 215,925.96, 297,978.24 and 120,438.84 is: 166,205.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,925.96 : 297,978.24 = 120,438.84 : x
  2. Step 2: Convert to fraction form
    215,925.96/297,978.24 = 120,438.84/x
  3. Step 3: Cross multiply
    215,925.96x = 297,978.24 × 120,438.84
  4. Step 4: Simplify right side
    215,925.96x = 35,888,153,570.84
  5. Step 5: Solve for x
    x = 35,888,153,570.84/215,925.96
  6. Step 6: Final answer
    x = 166,205.83

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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.