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Finding the Fourth Proportional to 66,196.80, 99,295.20 and 28,774.80

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Solution

The fourth proportional to 66,196.80, 99,295.20 and 28,774.80 is: 43,162.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,196.80 : 99,295.20 = 28,774.80 : x
  2. Step 2: Convert to fraction form
    66,196.80/99,295.20 = 28,774.80/x
  3. Step 3: Cross multiply
    66,196.80x = 99,295.20 × 28,774.80
  4. Step 4: Simplify right side
    66,196.80x = 2,857,199,520.96
  5. Step 5: Solve for x
    x = 2,857,199,520.96/66,196.80
  6. Step 6: Final answer
    x = 43,162.20

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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.