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Finding the Fourth Proportional to 45,099.80, 67,652.66 and 11,820.68

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Solution

The fourth proportional to 45,099.80, 67,652.66 and 11,820.68 is: 17,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,099.80 : 67,652.66 = 11,820.68 : x
  2. Step 2: Convert to fraction form
    45,099.80/67,652.66 = 11,820.68/x
  3. Step 3: Cross multiply
    45,099.80x = 67,652.66 × 11,820.68
  4. Step 4: Simplify right side
    45,099.80x = 799,700,445.01
  5. Step 5: Solve for x
    x = 799,700,445.01/45,099.80
  6. Step 6: Final answer
    x = 17,731.80

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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.