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Finding the Fourth Proportional to 40,716.80, 61,075.20 and 14,451.20

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Solution

The fourth proportional to 40,716.80, 61,075.20 and 14,451.20 is: 21,676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,716.80 : 61,075.20 = 14,451.20 : x
  2. Step 2: Convert to fraction form
    40,716.80/61,075.20 = 14,451.20/x
  3. Step 3: Cross multiply
    40,716.80x = 61,075.20 × 14,451.20
  4. Step 4: Simplify right side
    40,716.80x = 882,609,930.24
  5. Step 5: Solve for x
    x = 882,609,930.24/40,716.80
  6. Step 6: Final answer
    x = 21,676.80

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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.