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Finding the Fourth Proportional to 213,410.40, 320,115.72 and 63,755.76

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Solution

The fourth proportional to 213,410.40, 320,115.72 and 63,755.76 is: 95,633.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,410.40 : 320,115.72 = 63,755.76 : x
  2. Step 2: Convert to fraction form
    213,410.40/320,115.72 = 63,755.76/x
  3. Step 3: Cross multiply
    213,410.40x = 320,115.72 × 63,755.76
  4. Step 4: Simplify right side
    213,410.40x = 20,409,221,016.55
  5. Step 5: Solve for x
    x = 20,409,221,016.55/213,410.40
  6. Step 6: Final answer
    x = 95,633.68

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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.