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Finding the Fourth Proportional to 215,881.20, 297,928.80 and 120,385.44

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Solution

The fourth proportional to 215,881.20, 297,928.80 and 120,385.44 is: 166,139.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,881.20 : 297,928.80 = 120,385.44 : x
  2. Step 2: Convert to fraction form
    215,881.20/297,928.80 = 120,385.44/x
  3. Step 3: Cross multiply
    215,881.20x = 297,928.80 × 120,385.44
  4. Step 4: Simplify right side
    215,881.20x = 35,866,289,676.67
  5. Step 5: Solve for x
    x = 35,866,289,676.67/215,881.20
  6. Step 6: Final answer
    x = 166,139.01

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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.