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Finding the Fourth Proportional to 61,197.30, 91,790.55 and 16,820.10

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Solution

The fourth proportional to 61,197.30, 91,790.55 and 16,820.10 is: 25,228.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,197.30 : 91,790.55 = 16,820.10 : x
  2. Step 2: Convert to fraction form
    61,197.30/91,790.55 = 16,820.10/x
  3. Step 3: Cross multiply
    61,197.30x = 91,790.55 × 16,820.10
  4. Step 4: Simplify right side
    61,197.30x = 1,543,926,230.06
  5. Step 5: Solve for x
    x = 1,543,926,230.06/61,197.30
  6. Step 6: Final answer
    x = 25,228.67

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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.