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Finding the Fourth Proportional to 45,605.12, 68,407.91 and 20,615.91

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Solution

The fourth proportional to 45,605.12, 68,407.91 and 20,615.91 is: 30,923.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,605.12 : 68,407.91 = 20,615.91 : x
  2. Step 2: Convert to fraction form
    45,605.12/68,407.91 = 20,615.91/x
  3. Step 3: Cross multiply
    45,605.12x = 68,407.91 × 20,615.91
  4. Step 4: Simplify right side
    45,605.12x = 1,410,291,367.39
  5. Step 5: Solve for x
    x = 1,410,291,367.39/45,605.12
  6. Step 6: Final answer
    x = 30,923.97

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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.