Home / 213,475.12-320,212.64-80,385.20

Finding the Fourth Proportional to 213,475.12, 320,212.64 and 80,385.20

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Solution

The fourth proportional to 213,475.12, 320,212.64 and 80,385.20 is: 120,577.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,475.12 : 320,212.64 = 80,385.20 : x
  2. Step 2: Convert to fraction form
    213,475.12/320,212.64 = 80,385.20/x
  3. Step 3: Cross multiply
    213,475.12x = 320,212.64 × 80,385.20
  4. Step 4: Simplify right side
    213,475.12x = 25,740,357,108.93
  5. Step 5: Solve for x
    x = 25,740,357,108.93/213,475.12
  6. Step 6: Final answer
    x = 120,577.78

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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.