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Finding the Fourth Proportional to 40,763.76, 61,059.12 and 19,672.80

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Solution

The fourth proportional to 40,763.76, 61,059.12 and 19,672.80 is: 29,467.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,763.76 : 61,059.12 = 19,672.80 : x
  2. Step 2: Convert to fraction form
    40,763.76/61,059.12 = 19,672.80/x
  3. Step 3: Cross multiply
    40,763.76x = 61,059.12 × 19,672.80
  4. Step 4: Simplify right side
    40,763.76x = 1,201,203,855.94
  5. Step 5: Solve for x
    x = 1,201,203,855.94/40,763.76
  6. Step 6: Final answer
    x = 29,467.45

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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.