Home / 215,890.11-323,856.77-66,128.67

Finding the Fourth Proportional to 215,890.11, 323,856.77 and 66,128.67

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Solution

The fourth proportional to 215,890.11, 323,856.77 and 66,128.67 is: 99,199.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,890.11 : 323,856.77 = 66,128.67 : x
  2. Step 2: Convert to fraction form
    215,890.11/323,856.77 = 66,128.67/x
  3. Step 3: Cross multiply
    215,890.11x = 323,856.77 × 66,128.67
  4. Step 4: Simplify right side
    215,890.11x = 21,416,217,139.95
  5. Step 5: Solve for x
    x = 21,416,217,139.95/215,890.11
  6. Step 6: Final answer
    x = 99,199.62

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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.