Home / 45,129.12-67,709.88-20,167.08

Finding the Fourth Proportional to 45,129.12, 67,709.88 and 20,167.08

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Solution

The fourth proportional to 45,129.12, 67,709.88 and 20,167.08 is: 30,257.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,129.12 : 67,709.88 = 20,167.08 : x
  2. Step 2: Convert to fraction form
    45,129.12/67,709.88 = 20,167.08/x
  3. Step 3: Cross multiply
    45,129.12x = 67,709.88 × 20,167.08
  4. Step 4: Simplify right side
    45,129.12x = 1,365,510,566.75
  5. Step 5: Solve for x
    x = 1,365,510,566.75/45,129.12
  6. Step 6: Final answer
    x = 30,257.86

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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.